At what value of X does the function y = -3 - 2x + X2 attain a minimum value?
A
-1
B
14
C
4
D
1
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
Given that y = -3 - 2x + X2
then, \(\frac{dy}{dx}\) = -2 + 2x
At maximum value, \(\frac{dy}{dx}\) = O
therefore, -2 + 2x
2x = 2
x = 2/2 = 1
Source: WAEC / JAMB / NECO Classroom Archive (Record #29563)