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The instantaneous rate of change at t=1 ...

The instantaneous rate of change at `t=1` for the function `f(t)=te^(-1)+9` is

A

`-1`

B

`9`

C

`0`

D

`2`

Text Solution

Verified by Experts

The correct Answer is:
C
Given `f(t)=te^(-t)+9`
`:.f'(t)=-te^(-t)+e^(-t)`
`:.f'(1)=(-1)/e+1/e=0`
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