Derivative of f(t) = te^(2-7t)

[kxpatel29]

Homework Statement

What is the derivative of f(t) = te^(2-7t)

Homework Equations

We would use product rule and chain rule, I believe

The Attempt at a Solution

(t)(e^(2-7t)
(1)(e^(2-7t)(-7)

answer: -7(e^(2-7t))

 

[PsychoDash]

You are correct in saying that the product and chain rules are needed, however you neglected to apply the product rule.

f(t)=t*e^2-7t
f'(t)=t*d/dt(e^2-7t)+d/dt(t)*e^2-7t