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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 8251. |
Jhhb |
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Answer» ? ???? Well I know these types of disturbing elements??? Haha!!!!avneet he wants to make us fool!!!??? ?? |
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| 8252. |
LimX-->infinity x/√x+√x+√x |
| Answer» Infinity | |
| 8253. |
1*2^2+2*3^2+3*4^2..........to n term |
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Answer» I know it is lengthy but ....if u will read it step by step u will find it....easy And after finding nth term multiply nth terms of both of them...then u will get....n(n^2) which will give u n^3 and then...taking summation ....as sigma n^3 apply formula and u will get answer As given in question.....1×2^2 + 2×3^2...firstly separate the no.s in multiplication ....u can write....(1+2+3........)(2^2 + 3^2 + 4^2.........)then find nth term of each...u will get nth term of (1+2+3.....)=n and nth term of other one will be....n^2 |
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| 8254. |
If line 3x- ay -1 =0 is parallel to the line (a+2)x-y+3=0 then find the value of a. |
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Answer» a=1 A=1 |
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| 8255. |
Differentiate cos x by first principle |
| Answer» -sinx | |
| 8256. |
Lim X--π/2 tan2x ÷ (x-π/2) |
| Answer» its 2 | |
| 8257. |
Factorise X square+1/X square -1 |
| Answer» -1+root5/2 or -1-root5/2 | |
| 8258. |
2×3÷4 |
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Answer» 2×0.75=1.5 1.50 1.5 1.5 what a silly question 1.50 1.5 |
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| 8259. |
Integration of secx .tanx and limit is 0 to alpha |
| Answer» Sec x | |
| 8260. |
Find the value of tan( 19/3 pie) |
| Answer» 1/√3 | |
| 8261. |
Find the value of sin 45/2 ? |
| Answer» | |
| 8262. |
Why is 0!=1?? |
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Answer» By factorial method we counts how many ways a thing can happen . When we say a thing can happen only one way we can say either 0!or 1! This method which i understood why 0!=1. Now if u want 9! U will do 10!/10,if u want 8! U will do 9!/9 similarly so on still 2!/2=1! then same way for 0!(zero factorial what u need) u will do 1!/1 hence u will get 0!=1! Which is nothing but 1. Hope understood this.there are many other way also but this one gave satisfaction to me. |
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| 8263. |
Find Derivative of tan x from first principle. |
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Answer» f (x+h)=lim h->0 tan (x+h)-tanx /h ;lim h->0 sin (x+h-x)/cos (x+h)cosx .h ;lim h->0 sin h/h cos (x+h)cosx ;lim h->0 1/cos (x+h)cosx ;Putting h=01/cos (x+0)cosx ;1/cosx.cosx ;1/cosx^2 ;Secx^2 its sec^2 x Answer |
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| 8264. |
√3cos+sin=√2 |
| Answer» Break down cos in half angle | |
| 8265. |
What is rolls therum |
| Answer» In calculus, Rolle\'s theorem or Rolle\'s lemma essentially states that any real-valued differentiable function that attains equal values at two distinct points must have at least one stationary point somewhere between them—that is, a point where the first derivative (the slope of the tangent line to the graph of the function) is zero. | |
| 8266. |
How to watch log table? |
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Answer» ?? yakshiii ???yakshi ??? Yakshi what! U said??? With eyes.....or u can also watch it with nose or ears..... U can watch videos to understand that or ask ur teacher. It quite tough to explain by texting.and u will not understand that also |
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| 8267. |
Good morning everyone ☕☕☕☕ |
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Answer» That\'s right Please don\'t post this rubbish thing....post only Question and try to help other by solving their problem Gm G.m |
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| 8268. |
Find the equations of the sides of the triangle whose vertices are (2,1), (-2,3), (4,3). |
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| 8269. |
If A and B are two finite sets,then prove that n(A union B )= n(A)+n(B)-n( A intertsection B) |
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| 8270. |
If x=√3+√2 then find the value of x^3 + 1/x^3 ?A) 6√3 B)12√3 C)18√3 D)24√3 |
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Answer» (a+b) ^3 = a^3 + b^3 + 3ab(a+b)------->a^3 + b^3 = (a+b)^3 -- 3ab(a+b)similary:- if, a = x and b = 1/x then x^3 + 1/x^3 = (x + 1/x)^3 -- 3x*1/x(x + 1/x) =(x + 1/x)^3 -- 3(x + 1/x) 1/x = 1/√3 + √2 =1*√3 -- √2/√3 + √2*√3 -- √2 =√3 -- √2/(√3) ^2 -- (√2) ^2 =√3 -- √2/3 -- 2 =√3 -- √2x + 1/x = √3 + √2 + √3 -- √2 =2√3 Putting in equation in 5th line = (2√3) ^3 -- 3(2√3) =24√3 -- 6√3 =18√3 ANSWER = 18√3 C) The correct answer is (A). |
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| 8271. |
What is the Three dimensional coordinate |
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Answer» X, y and z coordinates which divides the 3d plane in 8 octants It could be wrong! I think i^ j^ and k^ |
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| 8272. |
a+b+c=1, c=m(a×b), a=1÷√2, b=1÷√3,c=1÷√6 show that a and b are perpendicular |
| Answer» | |
| 8273. |
Equation of tangent on circle from point |
| Answer» y=mx+c | |
| 8274. |
All trigonometric function formula |
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Answer» Last page of ncert there are all formulas of trigonometry Pl?? search on Google sin2 θ + cos2 θ = 1.sin (–θ) = –sin θ, andcos (–θ) = cos θ.sin (θ + 2π) = sin θ, andcos (θ + 2π) = cos θ.cos θ = sin (π/2 – θ)sin θ = cos (π/2 – θ) |
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| 8275. |
What is the surface area of hemisphere |
| Answer» 2πr^2 is surface area of hemisphere formula | |
| 8276. |
X-1/x find dy/dx |
| Answer» | |
| 8277. |
10th class chapter 13 |
| Answer» Ok | |
| 8278. |
P(A)=p(B),show that A=B |
| Answer» | |
| 8279. |
Differentiation of (2x+3)(3x-5) |
| Answer» {tex}\\begin{array}{l}\\frac d{dx}(\\;(2x+3)(3x-5)=(3x-5)\\frac{\\displaystyle d}{\\displaystyle dx}(2x+3)\\;+(2x+3)\\frac{\\displaystyle d}{\\displaystyle dx}(3x-5)\\\\(3x-5)(2)+(2x+3)(3)\\\\=6x-10+6x+9\\\\=12x-1\\end{array}{/tex} | |
| 8280. |
Find the value of cos(-870degree) |
| Answer» Cos (-870) = Cos 870 = Cos (90 x 9 + 60)= -Sin 60= -\u200b √3/2 | |
| 8281. |
Major axis on the x-axis and passes through the point (4,3) and (6,2) |
| Answer» | |
| 8282. |
Sin 765 ° |
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Answer» 765=720+45sin(765)=sin(720+45)=sin(2∗360+45)So sin(2∗360+45)=sin45=(1/2).5Hope this is useful sin(720+45)=sin45=1/√2 |
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| 8283. |
Let A=(a,b),B=(a,b,c).Is A |
| Answer» A is subset of B | |
| 8284. |
can you solve this by using first princlple sin(x+1) |
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Answer» Ok yes Is this miscellaneous question f(x) = sin (x+1)f(x+h)=sin (x+h+1)f\'x =limh-0 f(x+h)-f(x)/hf\'x= lim h-0 sin (x+h+ 1) - sin (x+1) /h Lim h-0 2cos (2x+h+2 /2) sin(h/2) /hLim h-0 cos (x+1+h/2 ) Lim h/2-0 ( sin h/2/h/2 ) h-0 =h/2 - o/2 =0 Hence cos (x+1) .. pls its urgent ? by using this formulae f\'x=lim x-->xf(t)-f(x)/t-x |
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| 8285. |
Solutions of supllementary of straight lines |
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| 8286. |
Lim x-a root x +root a divided by x+a |
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Answer» Limx--a rootx+roota/x+aBy rationalising and then by putting the value of x you will get the result . by using divide rule you get it |
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| 8287. |
Lim (x²+4x²+4x+3)/x²+2x-3X-3 |
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| 8288. |
Find the value of x and y if 3x +(2x-y)i =6-3i |
| Answer» 3x=6 this impliesX=2.2x-y=-3 Substitute x=2 Therefore,4-y=-3This implies y=4+3=7 | |
| 8289. |
Find the diameter of the circle ?the equation of the circle is (x-x1)(x-x2)+(y-y1)(y-y2) |
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Answer» Your welcome ayushi Thanks. We have to find the equation of circle whose diameter is join of the point (x₁,y₁) and (x₂, y₂) . Let A ≡ (x₁,y₁) and B ≡ (x₂,y₂)Then, equation of circle is given by (x - x₁)(x - x₂) +(y - y₁)(y - y₂) = 0 [ by formula ] x² - (x₁ + x₂)x + x₁x₂ + y² - (y₁ + y₂)y + y₁y₂ = 0x² + y² -(x₁ + x₂)x - (y₁ + y₂)y + x₁x₂ + y₁y₂ = 0 Hence, the equation of circle is x² + y² -(x₁ + x₂)x - (y₁ + y₂)y + x₁x₂ + y₁y₂ = 0 Hope this answer will help u.... |
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| 8290. |
Find a positive value of m for which the coefficient of( x)²in the expansion (1+x)m is 6 |
| Answer» x2 term is mc2.1m-2. x2we know 1 power anything is 1 so mc2=6m.(m-1)/2=6m2-m-12=0(m-4)(m+3)=0m=4,-3since m is positive so m=4 | |
| 8291. |
What is the equation of parabola |
| Answer» There are six types of eq. In parabola a)x=cy^2 b)x=-cy^2 c)y=cx^2 d)y=-cx^2 e)y=bx+cx^2 d)y=bx-cx^2 | |
| 8292. |
Please check question no. 3rd of 12.1 of class 11th mathematics. |
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Answer» I think that question is wrong. U can check in this app also..... |
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| 8293. |
What is mathematical reasoning concept explain. |
| Answer» Mathematical reasoning is the critical skill that enables a student to make use of all other mathematical skills. With the development of mathematical reasoning, students recognize that mathematics makes sense and can be understood. They learn how to evaluate situations, select problem-solving strategies, draw logical conclusions, develop and describe solutions, and recognize how those solutions can be applied. Mathematical reasoners are able to reflect on solutions to problems and determine whether or not they make sense. They appreciate the pervasive use and power of reasoning as a part of mathematics. | |
| 8294. |
How to study all concepts of straight lines |
| Answer» All concept of straight line remember then try to understand questions carefully | |
| 8295. |
Prove that tan3xtan2xtanx = tan3x-tan2x-tanx |
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Answer» Nice explained Priya Nice 3x=2x+xHence use tan3x formula1.Tan3x=tan2x+tanx/1-tan2xtan3x.2.Tan3x-tan3x.tan2xtanx=tan3x+tanx3.tan3x-tan2x-tanx=tan3x.tan2x.tanxHence proved I think in example Hey ,It is clear given in RD sharma book |
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| 8296. |
-15 -24 |
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Answer» Konsi class me ho? -39 -39 ????? -39??? |
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| 8297. |
All requierd formulas for ellipse and hyperbola |
| Answer» Given in ncert textbooks | |
| 8298. |
Derivative of first principles ( x- 1 ) ( x - 2 ) |
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Answer» ??? 2x-3 |
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| 8299. |
Solve 1% of 86400 |
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Answer» 86400/100 ×1 == 864 Hope this will help you...✌❤✌ 864 |
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| 8300. |
Give the ratio 25cm to 1m in the simplest form |
| Answer» 1:4 | |