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The interval of increase of the function...

The interval of increase of the function `f(x)=x-e^x+tan(2pi//7)` is (a) `(0,\ oo)` (b) `(-oo,\ 0)` (c) `(1,\ oo)` (d) `(-oo,\ 1)`

A

`(0,oo)`

B

`(-oo,0)`

C

`(1,oo)`

D

`(5,oo)`

Text Solution

Verified by Experts

The correct Answer is:
B
We have
`f(x)=x-e^x+tan((2pi)/7) rArr f'(x) =1-e^x`
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