If y = 3t3 + 2t2 – 7t + 3, find \(\frac{dy}{dt}\) at t = -1
- -1
- 1
-
-2
- 2
The correct answer is: C
Explanation
y = 3t3 + 2t2 - 7t + 3\(\frac{dy}{dt}\) = 9t2 + 4t - 7
When t = -1
\(\frac{dy}{dt}\) = 9(-1)2 + 4(-1) - 7
= 9 - 4 -7
= 9 - 11
= -2