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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
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YouExample 8 : Find the HCF and LCM of 6, 72 and 120, using the prime factorisa maeinsmethod.pr |
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Answer» Like if you find it useful |
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| 2. |
14. How many persons can be accommodated in ahall of length 16m, breadth 12.5 m and height4.5 m. Assuming that 3.6m3 of air is required foreach person? |
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4. How many terms of the A.P. 18,16,14.,.. . U laRel Su iu5. How many terms of the A.P. 65,60,55,.. be taken so that their sum is zero? O6. The 4th term of an A.P. is zero. Prove that the 25th term of the A.P. is three tin |
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I multiply| 07 |
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Answer» 51 is the correct answer plz like my answer 1/17 × 7 2/71/17 × 51/7lcm 1197× 867/119=6069/11951 answer 51 is the right answer 51 is the answer to your question 1/17 × 7(2/7)=1/17×51/7=7×867/119=6069/119=51 correct answer is 3/7 51 will be the answer 51 is the correct answer . . the correct answer is 51 3/7 is the answer. 1/17 x 51/751/11917x3=5117x7=119so, 3/7 is the answer. 51 is the correct answer 51 is the right answer 1/17×7 2/71/17×51/71/1×3/73/7 answer 51 is the right answer |
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सरल किजिएVS +118 - 21 |
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Answer» 3√2 is the correct answer. 3√2 correct answer hai 3√2 is the correct answer 3 √2 is correct answer 2.8228 3√2 is the correct answer |
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4) Express as a national nuber with =a denominator 5 |
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4. Represent /9.3 on the number line.5. Rationalise the denominators of the following:v7(ii) 52iv) 7-21V |
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1V12 23 5'7 '50'9'17 |
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Answer» What are you asked to do ? Arrange in ascending or descending ? descending order give me full answer |
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cos A = vs.2 |
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Answer» As we know thatCos A= √3/2Angle A= 30°sin(2*30)= sin(60°}= √3/2 |
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tn an A.P, if ph rmiand5. Interm is prove that the sum of firitof first pas is 1(m +1), where p # q.terms iS |
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Answer» Given pth term = 1/q That is ap = a + (p - 1)d = 1/q aq + (pq - q)d = 1 --- (1) Similarly, we get ap + (pq - p)d = 1 --- (2) From (1) and (2), we get, aq + (pq - q)d = ap + (pq - p)d aq - ap = d[pq - p - pq + q] a(q - p) = d(q - p) Therefore, a = d Equation (1) becomes, dq + pqd - dq = 1 d = 1/pq Hence a = 1/pq Consider, Spq = (pq/2)[2a + (pq - 1)d] = (pq/2)[2(1/pq) + (pq - 1)(1/pq)= (1/2)[2 + pq - 1] = (1/2)[pq + 1] |
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A)3. The ph term of an A.P is 9 and the 9h term is p. So the common difference of A.PisD)-1 |
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For what values of k, the system of equations x-2y-3, 3x + kv = 1 has a unique solution?atent from the no! nte d (a t h h-a) and B(a-h a Âą h) nrove that9. |
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Answer» For set of equations to have unique solutionx-2y=3....multipy with 33x+ky=1 3x-6=93x+ky=1 For unique solutionk not equal to -6 |
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19 Simplify : (VS+ V2)-S-2 |
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Answer» ( √5 + √2)² - ( √5 - √2)² ( √5 + √2 - √5 + √2) ( √5 + √2 + √5 -√2) ( 2√2) ( 2√5) 4√10 |
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I. Find the HCF 120 andgo8.00 |
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EXERCISE 11.2le ABC in which BC-7cm, ZB-75o and AB +AC 13 cm.construct a triangle ABC in which BC-8om |
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6. Rationalise the denominator of2+/3 |
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Answer» wrong |
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6. Rationalise the denominator5+2 |
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6-4307. Rationalise the denominator |
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6. Rationalise the denominalu7. If x=843/7, then find the value of x2 +-- |
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Answer» hit like if you find it useful |
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| 20. |
Rationalise the denominators of the following:(ii)6(iv) 7 -21V(i) 5+N2 |
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Rationalise the denominator\begin{array}{l}{6-4 \sqrt{2}} \\ {1+4 \sqrt{2}} \\ {\sqrt{7}+\sqrt{2}} \\ {a+2 \sqrt{14}}\end{array} |
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| 22. |
ph1. altophobia |
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Answer» Altophobiais the fear of heights. |
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| 23. |
2V3 -12VS + 2fx=çŚ2 and y=75-2v5-2: find :(ii) y2 |
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Answer» If x = root(5) - 2/root(5) + 2 Rationalise x = (root(5) - 2)^2 / 5 - 4 = (root(5) - 2)^2 = 5 + 4 - 4 root(5) = 9 - 4root(5) (i) x^2 = (9 - 4 root (5))^2 = 81 + 16*5 - 72 root (5) = 161 - 72 root (5) If y = root(5) + 2/root(5) - 2 Rationalise y = (root(5) + 2)^2 / 5 - 4 = (root(5) + 2)^2 = 5 + 4 + 4 root(5) = 9 + 4root(5) (i) y^2 = (9 + 4 root (5))^2 = 81 + 16*5 + 72 root (5) = 161 + 72 root (5) |
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-) What is the geometrical meaning of the zeroes of a polynomial. |
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Answer» Geometrically it is the point on x axis where Y =0 in the graph of the polynomial. geometrically it is the point on x axis where y =0 is the graph of the polynalomial |
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If a gue vs and a vs, find a -6.If a=-and b= |
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Answer» a = 3 + V5/ 3 - V5 x 3 + V5/ 3+ V5 = ( 3 + V5)^2/(3)^2-(5) = (3 + V5)^2/9-5= ( 3 + V5)^2/4_________(1); b = 3- V5/ 3 + V5 x 3 - V5/ 3 - V5 = (3 )^2-(5)/(3 -V5)^2= 9 - 5/(3- V5)^2= 4 / (3 -V5)^2____________(2); (3+V5)^2/4 × 4/ ( 3- V5)^2 = (3 + V5)^2/ ( 3 - V5)^2 = 9+5 +2(3)(V5)/ 9+5-2(3)(V5) = 14/14=1 9+5 +2(3)(V5) - 9 - 5 +2(3)(V5) = 2(3)(V5)+2(3)(V5)=6V5+6V5= 12V5 |
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n dividing 2x1 +4x+5x+7 by gto the quotient and remainder are x and 7-5x respoctively Find go |
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Answer» by using the division algorithem p(x)=g(x)*q(x)+r(x) 2x³+4x²+5x+7=g(x) x 2x +7-5x 2x³+4x²+5x+7-7+5x=g(x) x 2x 2x³+4x²+10x / 2x=g(x) so we should divide 2x³+4x²+10x by 2x by long division so g(x)=x²+2x+5 |
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1n Fig. 6.54, O is a point in the interior of a triangleABC OOL BC. OE.L AC and OFL AB. Show that(2 |
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Answer» b. part to answer thanx |
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sample 11: Find the sum of the first 22 terms of the AP: 8, 3, 2, |
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Answer» Your answer is wrong Answer is - 979Bcoz. N=22 so, n-1=22-1=21You take n-1 as 7... |
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youyOtfQ7. Find the sum of the first 22 terms of the AP:8, 3,-2,.. |
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Find the sum of first 22 terms of an AP in which d- 7 and 22nd term is 149. |
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Answer» Awsm yrr |
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ind the sum of first 22 terms of an AP in which d- 7 and 22nd term is 149 |
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Answer» Given d = 7,22nd term =149 ,⇒ a+21d = 149⇒a+21(7) = 149⇒a+147 = 149⇒a=149-147=2Sn = (n/2)(2a+(n-1)d)S₂₂ = (22/2)(2×2+(22-1)7)S₂₂ = 11(4+21(7))S₂₂ = 11(4+147)S₂₂ = 11(151)S₂₂ = 1661. |
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:.Find the sum of first 22 terms of an AP in which d-7 and 22nd term is 140 |
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7.Find the sum of first 22 terms of an AP in which d= 7 and 22nd term is 149 |
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6 Rationalise the denominator |
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6. Rationalise the denominator |
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Answer» not |
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8. Show geometrical construction: (a)4.8(b) 19.3 |
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| 37. |
A similarity between optical and geometricalisomerism is that |
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Answer» Hence, the similarity is that both are included in stereoisomerism |
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c) Convert (1567)gto 16 |
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| 39. |
5.Rationalise the denomina7 |
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Answer» = 1 / root 7 = 1 / root 7 * root 7/ root 7 = root 7/ (root 7)^2 = root 7/ 7. |
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14. Rationalise the denomination5-3 |
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Answer» (5+√3)(5+√3)/5-3(5+√3)^2/225+9+10√3/2(34+10√3)/217+5√3 is it correct ? |
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Example 11 : Show that 32 is irrational. |
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Answer» it's the right answer of this question Let us consider that 3root2 is a rational number. It can be written in the form p/q (p and q are co primes) p/q = 3root2 p/3q = root2 Now, p/3q = integer/interger = rational number But, this contradicts the fact that root2 is irrational. Therefore, our assumption that 3root2 is rational is WRONG. Hence, 3root2 is an irrational number. THANKS 4Comments ReportTHE BRAINLIEST ANSWER! sonali9898 ExpertIf possible let 3 root under 2 is rational. Then there exists co primes a and b (b not equal to 0) such that 3 root under 2 = a/b = root under 2 = a/3b since a and b are integers so a/3b is rational. thus, root under 2 is also rational. But , this contradicts the fact that root under 2 is irrational . so our assumption is incorrect. Hence 3 root under 2 is irrational. Read more on Brainly.in - https://brainly.in/question/8602445#readmore it's the right answer of this question it's the right answer of this question 1.141×33.423is correct answer |
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subuatExample 11 : Add 24 and 35 |
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Answer» (24/5)+(23/6)=(144+115)/30=259/30=8.63 |
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dydxExample 11 : If xa (θ-sin θ)anda (1-cos θ), findy. |
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Answer» hit like if you find it useful |
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| 44. |
Example 11 : Find the sum of the first 22 terms of the AP:8,3,-2 |
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Answer» a=8d=3-8=-5n=22Sn=n/2(2a+(n-1)d)S22=22/2(2*8+21*-5)=11(16-105)=-979 |
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\left. \begin array l \text 78 a = 1 , d = \square , t _ n = 149 \\ t _ n = a %2B ( n - 1 ) d \\ 149 = \square \\ 149 = 2 n - \square \\ n = \square \end array \right. |
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Answer» d=3-1=2149=1+(n-1)2149=1+2n-2149=2n-1150=2nn=75 |
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neal umbens Such1to133(C)ä¸11811s |
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What is the value ofcos (45- A)-cos (45+ A) ?45.(B)(C)(D)2 cos A、/2 sin A2 sin A2 cos A |
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Answer» cos(45°-A)-Cos(45°+A)=cos45°cosA+sin45°sinA-cos45°cosA+sin45°sinA=2sin45°sinA=2(1/√2)sinA=√2 sinA |
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For specifying a straight line, how many geometricalparameters should be known?NCERT Exemplar) |
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Answer» Equation of straight line: y=mx+c where, m=slope=tanθ, θ is the angle made with positive x-axis c=intercept on y-axisso we need two parameters, "m" and "c" to specify a straight line |
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45-646+545 |
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Answer» 45-646+545590-646= -56 45-646+54545+545-646590-646-56 45-646+545=45+545-646=590-646=- 56 -56 is a correct answer answer is 45- 646+545=1236 -56 is the correct answer 45-646+545=590-646= -56 is correct answer. 45-646+54545+545-646590-646-56 |
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| 50. |
lan numeral:a) 980b) 456c) 290d) 8673. How many tens makea) 1 hundred?b) 1 thousand?4. Estimate to the nearest hundra) 1567 x 4590b) 40987 - 789c) 56732 +9342 +6775. Write the largest 7- digit numhow much?6. Find the product using distriba) 149 x 70 + 149 x20 + 14912 y 329 |
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Answer» 10 tens in 100 and 10 thousands in 1 thousand 3.a,10tens,b,100tens 10 tens in 100 & 10 thousand in 1000 |
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