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If In = int0^(pi//4) tan^n x dx, then li...

If `I_n = int_0^(pi//4) tan^n x dx`, then `lim_(n to oo) n [I_n + I_(n -2)]` equals :

A

44228

B

1

C

`oo`

D

zero

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The correct Answer is:
B
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HIMALAYA PUBLICATION-Definite Integrals and its Application-QUESTION BANK
  1. int0^(10pi) |sin x| dx is

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  2. int(-pi)^(pi) (2x(1 + sin x))/(1 + cos^2 x) dx is :

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  3. If In = int0^(pi//4) tan^n x dx, then lim(n to oo) n [In + I(n -2)] eq...

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  4. If f(a + b - x) = fx, then inta^b x f(x) dx is equal to :

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  5. The value of the integral I = int0^1 x (1 - x)^(n) dx is :

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  6. Let d/(dx) F(x) = ((e^(sin x))/(x)) , x > 0. If int1^4 3/x e^(sin x^3)...

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  7. If f(y) = e^(y), g(y) = y , y > 0 and F(t) = int0^t f(t - y) g(y) dy...

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  8. Let f(x) be a function satisfying f'(x) = f(x) with f(0) = 1 and g(x) ...

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  9. If f(x) = (e^x)/(1 + e^x) , I1 = int(f(-a))^(f(a)) x g {x(1 - x)} dx a...

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  10. The value of I = int0^(pi//2) ((sin x + cos x)^2)/(sqrt(1 + sin 2x)) d...

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  11. The value of int(-2)^3 |1 - x^2| dx is:

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  12. If int0^pi x f (sin x)dx = A int0^(pi//2) f (sin x) dx, then A is :

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  13. Let F : R to R be a differentiable function having : f(2) = 6, f'(2) =...

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  14. int0^(pi) x f (sin x) dx is equal to :

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  15. int(-3pi//2)^(-pi//2) [(x +pi)^3 + cos^2 (x + 3x)]dx is equal to :

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  16. If f(x) ={(e^(cosx)sinx; |x| le 2),(2 ; othe...

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  17. The value of integral int(e^(-1))^(e^2) |(loge x)/(x)| dx is :

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  18. Let g(x) = int0^(x) f(t) dt, where 1/2 le f(t) < 1, t in [0,1] and 0 <...

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  19. The value of int(-pi)^(pi) (cos^2 x)/(1 + a^x) dx, a > 0, is :

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  20. Let f : (0, oo ) to R and F(x) = int0^x f(t) dt. If F(x^2) = x^2(1 +...

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