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9901.

If the points (2,0), (0,1), (4,0) and (0,a) are concyclic then a=

Answer» If the points (2,0), (0,1), (4,0) and (0,a) are concyclic then a=
9902.

Reduce the following equations into intercept form and find theirintercepts on the axes.(i) 3x+ 2y – 12 = 0 (ii) 4x – 3y = 6 (iii) 3y + 2 = 0.

Answer»


Reduce the following equations into intercept form and find their
intercepts on the axes.



(i) 3x
+ 2y – 12 = 0 (ii) 4x – 3y = 6
(iii) 3y + 2 = 0.

9903.

y= (√x+1÷√x)^2Differentiate

Answer» y= (√x+1÷√x)^2
Differentiate
9904.

For what values of a and b if A = B, whereA=a+43b8-6, B=2a+2b2+28b2-5bDisclaimer: There is a misprint in the question, b2 − 5b should be written instead of b2 − 56.

Answer» For what values of a and b if A = B, where



A=a+43b8-6, B=2a+2b2+28b2-5b



Disclaimer: There is a misprint in the question, b2 − 5b should be written instead of b2 − 56.
9905.

The area bounded by the curve y=1x2 and its asymptote between the lines x=1 to x=3 is

Answer»

The area bounded by the curve y=1x2 and its asymptote between the lines x=1 to x=3 is

9906.

A tangent is drawn to the parabola y2=6x which is perpendicular to the line 2x+y=1. Which of the following points does NOT lie on it ?

Answer»

A tangent is drawn to the parabola y2=6x which is perpendicular to the line 2x+y=1. Which of the following points does NOT lie on it ?

9907.

The number of integers x satisfying −3x4+det⎡⎢⎣1xx21x2x41x3x6⎤⎥⎦=0 is equal to

Answer»

The number of integers x satisfying
3x4+det1xx21x2x41x3x6=0
is equal to

9908.

Find the coordinates ofthe point where the line through (3, ­−4, −5) and (2,− 3, 1) crosses the plane 2x + y + z = 7).

Answer»

Find the coordinates of
the point where the line through (3, ­−4, −5) and (2,
− 3, 1) crosses the plane 2x + y + z = 7).

9909.

Which of the following is a univariate polynomial?

Answer» Which of the following is a univariate polynomial?
9910.

If P=⎡⎢⎣x 0 00 y 00 0 z⎤⎥⎦ and Q=⎡⎢⎣a 0 00 b 00 0 c⎤⎥⎦ then prove that PQ=⎡⎢⎣xa 0 00 yb 00 0 zc⎤⎥⎦=QP

Answer»

If P=x 0 00 y 00 0 z and Q=a 0 00 b 00 0 c then prove that

PQ=xa 0 00 yb 00 0 zc=QP

9911.

If (3644)k is the term, independent of x, in the binomial expansion of (x4−12x2)12, then k is equal to

Answer» If (3644)k is the term, independent of x, in the binomial expansion of (x412x2)12, then k is equal to
9912.

The value of ∫cot4x dx is

Answer»

The value of cot4x dx is

9913.

30. If f(x)-0,x0-1, x>(0For what value (s) of a does lim fo) exists?

Answer» 30. If f(x)-0,x0-1, x>(0For what value (s) of a does lim fo) exists?
9914.

25.Find the probability of having al least one boy in a family of 3 children

Answer» 25.Find the probability of having al least one boy in a family of 3 children
9915.

z and w are non zero complex number and / z / = /w/ and arg( z ) +arg ( w ) = +pie therefore z = , where / / is denoted as modulus

Answer» z and w are non zero complex number and / z / = /w/ and arg( z ) +arg ( w ) = +pie therefore z = , where / / is denoted as modulus
9916.

Let f:(−π2, π2)→R be given by f(x) = [log(sec x+tan x)]3. Then

Answer»

Let f:(π2, π2)R be given by f(x) = [log(sec x+tan x)]3. Then

9917.

The equation (y–1)=m(x–2) represents a family of lines passing through (2,1). But this equation does not include the line x–2=0, since the slope of the line is not defined. A line y=mx through (0,0) cuts the lines x+y=3 and x+y=5 at two distinct points A and B respectively. AB=d

Answer»

The equation (y1)=m(x2) represents a family of lines passing through (2,1). But this equation does not include the line x2=0, since the slope of the line is not defined. A line y=mx through (0,0) cuts the lines x+y=3 and x+y=5 at two distinct points A and B respectively. AB=d

9918.

If \log2, \log(2^n-1) and \log(2^n+3) are in AP, then n =

Answer» If \log2, \log(2^n-1) and \log(2^n+3) are in AP, then n =
9919.

If y=ex+sinx, then d2xdy2 is equal to

Answer»

If y=ex+sinx, then d2xdy2 is equal to

9920.

The distance moved by the particle in time t is given by x=t3−12t2+6t+8. At the instant when its acceleration is zero, then the velocity is

Answer»

The distance moved by the particle in time t is given by x=t312t2+6t+8. At the instant when its acceleration is zero, then the velocity is



9921.

If →a,→b,→c are non-zero vectors such that |→a|=|→b| and →a⋅(2→a+→b−→c)=→b⋅(→a+2→b+→c), then which of the following is/are true ?

Answer»

If a,b,c are non-zero vectors such that |a|=|b| and a(2a+bc)=b(a+2b+c), then which of the following is/are true ?

9922.

Consider function f(x)=⎧⎪⎨⎪⎩ax(x−1)+b,x<1x−1,1≤x≤3.px2+qx+2,x>3 If f(x) satisfies the following conditionsa)f(x) is continuous for all x.b)f′(1) does not exist.c)f′(x) is continuous at x=3. Then the value of p+q3+1 is

Answer» Consider function f(x)=ax(x1)+b,x<1x1,1x3.px2+qx+2,x>3 If f(x) satisfies the following conditions

a)f(x) is continuous for all x.

b)f(1) does not exist.

c)f(x) is continuous at x=3. Then the value of p+q3+1 is
9923.

If one root of the quadratic equation 2x2+2x+k=0 is -13 then find the value of k.

Answer» If one root of the quadratic equation 2x2+2x+k=0 is -13 then find the value of k.
9924.

The shape factor of the section shown in figure is2

Answer»

The shape factor of the section shown in figure is





  1. 2
9925.

There are two bags, one of which contains 5 black and 4 white balls while the other contains 3 black and 6 white balls. A die is thrown. If it shows up 1 or 3, a ball is taken from the first bag. But if it shows up any other number, a ball is chosen from the second bag. Find the probability of choosing a white ball.

Answer»

There are two bags, one of which contains 5 black and 4 white balls while the other contains 3 black and 6 white balls. A die is thrown. If it shows up 1 or 3, a ball is taken from the first bag. But if it shows up any other number, a ball is chosen from the second bag. Find the probability of choosing a white ball.


9926.

If the graph y=g(x) has a minimum point at (4,2), then minimum point of the graph y=g(x−5)−3 is

Answer»

If the graph y=g(x) has a minimum point at (4,2), then minimum point of the graph y=g(x5)3 is

9927.

If A={α,β,γ},B={1,2,3,4}, then the number of elements in set A×B×B is

Answer»

If A={α,β,γ},B={1,2,3,4}, then the number of elements in set A×B×B is

9928.

If →a=4^i−^j+^k and →b=2^i−2^j+^k, then find a unit vector parallel to the vector →a+→b

Answer» If a=4^i^j+^k and b=2^i2^j+^k, then find a unit vector parallel to the vector a+b
9929.

In a hyperbola e = 94 and the distance between the directrices is 3. Then the length of Transverse axis is

Answer»

In a hyperbola e = 94 and the distance between the directrices is 3. Then the length of Transverse axis is



9930.

∫e(sinx−1x)(1+x cosx+1x)dx is

Answer» e(sinx1x)(1+x cosx+1x)dx is
9931.

If α,β be roots x2+px+1=0 and γ,δ are the roots of x2+qx+1=0, then (a−γ)(β−γ)(α+δ)(β+δ) is

Answer»

If α,β be roots x2+px+1=0 and γ,δ are the roots of x2+qx+1=0, then (aγ)(βγ)(α+δ)(β+δ) is

9932.

If tan22∘+tan24∘+⋯+tan288∘=a, then the value of 89∘∑θ=1∘ sin4θ+cos4θsin2θ cos2θ is

Answer»

If tan22+tan24++tan288=a, then the value of 89θ=1 sin4θ+cos4θsin2θ cos2θ is

9933.

Using the fact that sin(A+B)=sinAcosB+cosAsinB and the differentiation, obtain the sum formula for cosines.

Answer»

Using the fact that sin(A+B)=sinAcosB+cosAsinB and the differentiation, obtain the sum formula for cosines.



9934.

The value of limn→∞n∑r=1n−rn2+r2 is

Answer»

The value of limnnr=1nrn2+r2 is

9935.

Two cubes have volumes in the ratio 1 : 64. The ratio of the area of a face of first cube to that of the other isa) 1 : 4b) 1 : 8c) 1 : 16d) 1 : 32

Answer» Two cubes have volumes in the ratio 1 : 64. The ratio of the area of a face of first cube to that of the other is

a) 1 : 4

b) 1 : 8

c) 1 : 16

d) 1 : 32
9936.

The total number of points of non-differentiability of f(x)=max{sin2x,cos2x,34} in [0,10π], is

Answer» The total number of points of non-differentiability of

f(x)=max{sin2x,cos2x,34} in [0,10π], is
9937.

Integrate the following functions w.r.t. x. ∫1cos(x+a) cos(x+b)dx.

Answer»

Integrate the following functions w.r.t. x.

1cos(x+a) cos(x+b)dx.

9938.

If f(x+y) = f(x) × f(y) where x,y belongs to R, find f(0) if f(0)>0?

Answer» If f(x+y) = f(x) × f(y) where x,y belongs to R, find f(0) if f(0)>0?
9939.

If A=[2−3−41], then adj(3A2+12A) is equal to

Answer»

If A=[2341], then adj(3A2+12A) is equal to

9940.

∫10sin−1(2x1+x2)dx=

Answer» 10sin1(2x1+x2)dx=
9941.

Let →a=2^i+^j−2^k and →b=^i+^j. If →c is a vector such that →a.→c=|→c|, |→c−→a|=2√2 and the angle between (→a×→b) and →c is 30∘ ,then |(→a×→b)×→c| is equal to

Answer»

Let a=2^i+^j2^k and b=^i+^j. If c is a vector such that a.c=|c|, |ca|=22 and the angle between (a×b) and c is 30 ,then |(a×b)×c| is equal to

9942.

Find the equation ofthe plane passing through the line of intersection of the planesandandparallel to x-axis.

Answer»

Find the equation of
the plane passing through the line of intersection of the planes
and
and
parallel to x-axis.

9943.

Given \vert\overrightarrow{A_1}\vert=2, \vert{\overrightarrow A}_2\vert= 3 and \vert\overrightarrow{A_1}+\overrightarrow{A_2\vert}= 3. Find the value of ({\overrightarrow A}_1+2\overrightarrow{A_2).}(3\overrightarrow{A_1} -4{\overrightarrow A}_2)

Answer» Given \vert\overrightarrow{A_1}\vert=2, \vert{\overrightarrow A}_2\vert= 3 and \vert\overrightarrow{A_1}+\overrightarrow{A_2\vert}= 3. Find the value of ({\overrightarrow A}_1+2\overrightarrow{A_2).}(3\overrightarrow{A_1} -4{\overrightarrow A}_2)
9944.

In a test (+5) marks are given for every correct answer and (- 2) marks are given for every incorrect answer.(i) Radhika answered all the questions and scored 30 marks and get 10 correct answers(ii) Jay also answered all the questions and scored (-12) marks though he got 4 correct answersHow many incorrect answers had they attempted?

Answer» In a test (+5) marks are given for every correct answer and (- 2) marks are given for every incorrect answer.

(i) Radhika answered all the questions and scored 30 marks and get 10 correct answers

(ii) Jay also answered all the questions and scored (-12) marks though he got 4 correct answers

How many incorrect answers had they attempted?
9945.

The following graph shows two straight lines passing through the origin. Find the slope of Line 2 from the given graph if the product of two slopes of the two lines is -1.

Answer»

The following graph shows two straight lines passing through the origin. Find the slope of Line 2 from the given graph if the product of two slopes of the two lines is -1.


9946.

Let A and B be two n×n matrices such that det(A)≠0, A+B=(AB)2 and BAB=A+I, where I is an identity matrix. Which of the following is/are CORRECT?

Answer»

Let A and B be two n×n matrices such that det(A)0, A+B=(AB)2 and BAB=A+I, where I is an identity matrix. Which of the following is/are CORRECT?

9947.

What is the cyclisity of numbers from 1 to 10.

Answer» What is the cyclisity of numbers from 1 to 10.
9948.

title

Answer»

title


9949.

Let In=e∫1x19(log|x|)n dx, where n∈N. If (20)I10=αI9+βI8, for natural numbers α and β, then α−β equals to

Answer» Let In=e1x19(log|x|)n dx, where nN. If (20)I10=αI9+βI8, for natural numbers α and β, then αβ equals to
9950.

The hypotenuse of a right angled triangle has its ends at the points (1, 3) and (−4, 1). Find the equation of the legs (perpendicular sides) of the triangle.

Answer» The hypotenuse of a right angled triangle has its ends at the points (1, 3) and (−4, 1). Find the equation of the legs (perpendicular sides) of the triangle.