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2551.

If x=1+logtt2, y=3+2logtt, find dydx

Answer» If x=1+logtt2, y=3+2logtt, find dydx
2552.

If (n+1)!=30⋅(n−1)!, then the value of n is

Answer» If (n+1)!=30(n1)!, then the value of n is
2553.

The feasible region for an LPP is shown in the given figure. Let z = 3x-4y be the objective function. Maximum value of z is(a) 0(b) 8(c) 12(d) –18

Answer» The feasible region for an LPP is shown in the given figure. Let z = 3x-4y be the objective function. Maximum value of z is







(a) 0

(b) 8

(c) 12

(d) –18
2554.

Find the value of |x+b| + |x + a| + |a-b| ___

Answer»



Find the value of |x+b| + |x + a| + |a-b| ___



2555.

A projectile is thrown with speed u making angle θ with horizontal at t=0. It just crosses two points of equal height, at time t=1 s and t=3 s respectively. Calculate the maximum height attained by it?(g=10 m/s2)

Answer»

A projectile is thrown with speed u making angle θ with horizontal at t=0. It just crosses two points of equal height, at time t=1 s and t=3 s respectively. Calculate the maximum height attained by it?

(g=10 m/s2)

2556.

Mark the correct alternative in the following question:The probability that a person is not a swimmer is 0.3. The probability that out of 5 persons 4 are swimmers isa C450.740.3 b C150.70.34 c C450.70.34 d 0.740.3

Answer» Mark the correct alternative in the following question:



The probability that a person is not a swimmer is 0.3. The probability that out of 5 persons 4 are swimmers is



a C450.740.3 b C150.70.34 c C450.70.34 d 0.740.3
2557.

The value of constants m and c for which y=mx+c is a solution of the differential equation D2y+3Dy+4y=4x(D2y=d2ydx2,Dy=dydx)

Answer»

The value of constants m and c for which y=mx+c is a solution of the differential equation D2y+3Dy+4y=4x

(D2y=d2ydx2,Dy=dydx)

2558.

The distance between the parallel lines x1=y−22=z−33 and →r=2^i−^j+3^k+λ(^i+2^j+3^k) is

Answer»

The distance between the parallel lines x1=y22=z33 and r=2^i^j+3^k+λ(^i+2^j+3^k) is

2559.

The surface area of a cube increases at a uniform rate of 0.5 cm2/sec. The rate of increase in the volume of the cube when the side is 20 cm is ____

Answer»

The surface area of a cube increases at a uniform rate of 0.5 cm2/sec. The rate of increase in the volume of the cube when the side is 20 cm is ____


2560.

If the average of a, b, c, d, and e is 38, average of a, c, and e is 28, and average of b and d is n2+4, then the value of n is ±k. Find the value of k.

Answer» If the average of a, b, c, d, and e is 38, average of a, c, and e is 28, and average of b and d is n2+4, then the value of n is ±k. Find the value of k.
2561.

Let ∗ be a binary operation on the set of natural numbers N defined by a∗b = ab for all a and b ϵ N , then ∗ is

Answer»

Let be a binary operation on the set of natural numbers N defined by ab = ab for all a and b ϵ N , then is


2562.

Coordinates of the focus of the parabola √xa+√yb=1 is

Answer» Coordinates of the focus of the parabola xa+yb=1 is
2563.

IfH1,H2,....H20be 20 harmonic means between 2 and 3, thenH1+2H1−2+H20+3H20−3=

Answer»

IfH1,H2,....H20be 20 harmonic means between 2 and 3, thenH1+2H12+H20+3H203=


2564.

The radius of gyration of a uniform rod of length l about an axis passing through a point l4 away from the centre of the rod and perpendicular to it is

Answer»

The radius of gyration of a uniform rod of length l about an axis passing through a point l4 away from the centre of the rod and perpendicular to it is

2565.

If −4≤8x−2≤4, then the minimum value of 1x2 is

Answer»

If 48x24, then the minimum value of 1x2 is

2566.

Let f:[−1,1]→[0,2] be a function defined by f(x)=mx+c where m>0. If f is onto and tan(tan−117+cot−18+cot−118) equals f(a) for some a∈[−1,1], then the value of [a]+9 is ([.] denotes the greatest integer function)

Answer» Let f:[1,1][0,2] be a function defined by f(x)=mx+c where m>0. If f is onto and tan(tan117+cot18+cot118) equals f(a) for some a[1,1], then the value of [a]+9 is

([.] denotes the greatest integer function)
2567.

if x=1-√2, then find the value of (x-1/x)^3

Answer» if x=1-√2, then find the value of (x-1/x)^3
2568.

r21-x66.

Answer» r21-x66.
2569.

05 If a and b are the roots of the equation x^2-ax+b=0 then (a)a=0,b=1(b)a=-2,b=1(c)a=1,b=-2(d)none of these

Answer» 05 If a and b are the roots of the equation x^2-ax+b=0 then (a)a=0,b=1(b)a=-2,b=1(c)a=1,b=-2(d)none of these
2570.

if α,β,γ are the zeroes of the polynomial 3x-x^3+5 then the incorrect option is (1)β^2-αγ=3 (2)αβγ=5 (3)β^3-3β=5 (4)all are correc

Answer» if α,β,γ are the zeroes of the polynomial 3x-x^3+5 then the incorrect option is (1)β^2-αγ=3 (2)αβγ=5 (3)β^3-3β=5 (4)all are correc
2571.

Express the following matrix as the sum of a symmetric and a skew-symmetric matrices; ⎡⎢⎣33−1−2−21−4−52⎤⎥⎦

Answer»

Express the following matrix as the sum of a symmetric and a skew-symmetric matrices;

331221452

2572.

If 4∫0√{x}dx=α, then the value of 3α is(where {⋅} denotes fractional part function)

Answer»

If 40{x}dx=α, then the value of 3α is

(where {} denotes fractional part function)

2573.

The value of limx→∞(x+1)10+(x+3)10+(x+5)10+⋯+(x+49)10(x+2)10+(x+4)10+(x+6)10+⋯+(x+26)10 is

Answer»

The value of limx(x+1)10+(x+3)10+(x+5)10++(x+49)10(x+2)10+(x+4)10+(x+6)10++(x+26)10 is



2574.

find the real values of the parameter a such that (2a +1)x^2 - a(x-1)=2 has one root greater than 1 and other less than 1

Answer» find the real values of the parameter a such that (2a +1)x^2 - a(x-1)=2 has one root greater than 1 and other less than 1
2575.

Find ∫xe−x dx

Answer» Find xex dx
2576.

Statements: T $ G, K P, M # T, P + M Conclusions: I. K T II. G $ P

Answer»

Statements: T $ G, K P, M # T, P + M

Conclusions:

I. K T

II. G $ P


2577.

Find the sum of theproducts of the corresponding terms of the sequences 2, 4, 8, 16, 32and 128, 32, 8, 2, .

Answer»

Find the sum of the
products of the corresponding terms of the sequences 2, 4, 8, 16, 32
and 128, 32, 8, 2,
.

2578.

The value of cos−1(1517)+2tan−1(15) is

Answer»

The value of cos1(1517)+2tan1(15) is

2579.

Let →a,→b,→c be three vectors such that |→a|=|→b|=|→c|=4 and angle between →a and →b is π/3 angle between →b and →c is π/3 and angle between →c and →a is π/3.The volume of trianglular prism whose adjacent edges are represented by the vectors →a,→b and →c

Answer»

Let a,b,c be three vectors such that |a|=|b|=|c|=4 and angle between a and b is π/3 angle between b and c is π/3 and angle between c and a is π/3.

The volume of trianglular prism whose adjacent edges are represented by the vectors a,b and c

2580.

∫x−sin x1+cos xdx=x tan(x2)+p log∣∣sec(x2)∣∣+c⇒p=

Answer»

xsin x1+cos xdx=x tan(x2)+p logsec(x2)+cp=


2581.

The value of limn→∞1n3n∑k=1(k2x) is

Answer»

The value of limn1n3nk=1(k2x) is

2582.

For the sequence 1,2,2,4,4,4,4,8,8,8,8,8,8,8,8,…, the 1025th term is

Answer»

For the sequence 1,2,2,4,4,4,4,8,8,8,8,8,8,8,8,, the 1025th term is

2583.

If the area of a triangle with vertices (-3,0), (3, 0) and (0, k) is 9 sq. units, then, the value of k will be: (a) 9 (b) 3 (c) -9 (c) 6

Answer»

If the area of a triangle with vertices (-3,0), (3, 0) and (0, k) is 9 sq. units, then, the value of k will be:

(a) 9
(b) 3
(c) -9
(c) 6

2584.

Integrate the following functions. ∫x2√x6+a6dx.

Answer»

Integrate the following functions.
x2x6+a6dx.

2585.

Find theangle between the vectors

Answer»

Find the
angle between the vectors

2586.

if the second largest side of quadrilateral is of length 10 then what is the length of largest side

Answer»

if the second largest side of quadrilateral is of length 10 then what is the length of largest side

2587.

A polynomial ax^3 + bx^2 + cx + d intersects the x-axis at (-2,0);(2,0) and the y-axis at (0,-4). Then, the value of 'b' is(a) 1(b) -1(c) 2(d) -2

Answer» A polynomial ax^3 + bx^2 + cx + d intersects the x-axis at (-2,0);(2,0) and the y-axis at (0,-4). Then, the value of 'b' is

(a) 1
(b) -1
(c) 2
(d) -2
2588.

State the types of the underlined phrases. The arrogant and vain man had been taught a lesson.

Answer»

State the types of the underlined phrases.

The arrogant and vain man had been taught a lesson.


2589.

For every positive integer n, 2n < n! when

Answer»

For every positive integer n, 2n < n! when



2590.

ntThe function f is continuous and has property f(f(x))=1-x, then find the value of f(1/3)+f(2/3)n

Answer» ntThe function f is continuous and has property f(f(x))=1-x, then find the value of f(1/3)+f(2/3)n
2591.

∫[1(7x−5)3+1√5x−4]dx

Answer» [1(7x5)3+15x4]dx
2592.

1 dx0

Answer» 1 dx0
2593.

Suppose α,β and θ are angles satisfying 0&lt;α&lt;θ&lt;β&lt;π2, then sinα−sinβcosβ−cosα=

Answer»

Suppose α,β and θ are angles satisfying 0<α<θ<β<π2, then sinαsinβcosβcosα=




2594.

Prove that: sin 5x=5 sin x-20 sin3 x+16 sin5 x

Answer» Prove that: sin 5x=5 sin x-20 sin3 x+16 sin5 x
2595.

If 9th term of an A.P. is zero, then its 29th and 19th terms are in the ratio __________.

Answer» If 9th term of an A.P. is zero, then its 29th and 19th terms are in the ratio __________.
2596.

Let A1,A2,⋯,An be the vertices of a regular polygon of n sides in a circle of radius unity and a=|A1A2|2+|A1A3|2+⋯|A1An|2, b=|A1A2||A1A3|⋯|A1An|, then ab=

Answer» Let A1,A2,,An be the vertices of a regular polygon of n sides in a circle of radius unity and
a=|A1A2|2+|A1A3|2+|A1An|2,
b=|A1A2||A1A3||A1An|, then ab=
2597.

The perpendicular distance of the point P(6,7,8) from XY−plane is

Answer»

The perpendicular distance of the point P(6,7,8) from XYplane is

2598.

The sum of first 20 terms of the sequence 0.5, 0.55, 0.555,...., is ___.

Answer»

The sum of first 20 terms of the sequence 0.5, 0.55, 0.555,...., is ___.

2599.

If X follows a binomial distribution with parameters n=8 and p=12, then P(|X–4|≤2) equals.

Answer»

If X follows a binomial distribution with parameters n=8 and p=12, then P(|X4|2) equals.

2600.

P is the extremity of the latus rectum of ellipse 3x2+4y2=48 in the first quadrant. The eccentric angle of P is

Answer» P is the extremity of the latus rectum of ellipse 3x2+4y2=48 in the first quadrant. The eccentric angle of P is