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If y= sec (tan^(-1) (x)), then dy/dx at ...

If `y= sec (tan^(-1) (x))`, then `dy/dx` at `x=1` is equal to ......... A) `44198` B) `1` C) `1/sqrt 2` D) `sqrt 2`

A

44198

B

1

C

1/`sqrt 2`

D

`sqrt 2`

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CHETANA PUBLICATION-Differentiation-Exercise
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