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If underset(0)overset(x)int (bt cos 4 t ...

If `underset(0)overset(x)int (bt cos 4 t - a sin 4t)/( t^(2))dt=(a sin 4x)/(x) "for all" x ne0` , then a and b are given by

A

`a=(1)/(4), b=1`

B

`a=2, b=2`

C

`a=-1b=4`

D

`a=2,b=4`

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The correct Answer is:
A
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  13. The points of extremum of phi (x)=int(1)^(x)e^(-t^(2//2)) (1-t^(2)) dt...

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  14. Let f:[2, infty) to R be the function defined by f(x)=x^(2)-4x+5, then...

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  15. The value of lim(x rarr0)(2int(0)^(cos x ) cos^(-1) (t))/(2x- sin 2 x)...

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  17. If f(x)=int0^x{f(t)}^(- 1)dt and int0^1{f(t)}^(- 1)=sqrt(2), then

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