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If variables x and y are related by the equation
`x=int_(0)^(y)(1)/(sqrt(1+9u^(2)))` du, then `(dy)/(dx)` is equal to

A

`(1)/(sqrt(1+9y^(2)))`

B

`sqrt(1+9y^(2))`

C

`1+9y^(2)`

D

`(1)/(1+9y^(2))`

Text Solution

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The correct Answer is:
B
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