Question on: JAMB Mathematics - 1994

If y = 3t3 + 2t2 - 7t + 3, find \(\frac{dy}{dt}\) at t = -1
A
-1
B
1
C
-2
D
2
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Correct Option: C
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

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