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. If f(x)=| x-2 | + | x + 1 |-x then f^'...

. If `f(x)=| x-2 | + | x + 1 |-x` then `f^' (-10)` is equal to:

A

`-3`

B

`-2`

C

`-1`

D

0

Text Solution

Verified by Experts

The correct Answer is:
A
For `x lt -1`
`f(x)=-(x-2)-(x+1)-x=-3x+1`
`thereforef'(x)=-3`
`impliesf'(-10)=-3`
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