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The area bounded by the curve y=f(x), X-...

The area bounded by the curve `y=f(x)`, X-axis and ordinates x=1 and x=b is `(b-1) sin (3b+4)`, find `f(x)`.

A

`3(x - 1) cos (3x +4) + sin(3x + 4) `

B

`(b- 1) sin (3x + 4)+ 3cos (3x + 4)`

C

`(b - 1) cos (3x + 4) + 3sin (3x + 4)`

D

None of these

Text Solution

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The correct Answer is:
A
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