2010
Mathematics
JAMB
At what value of X does the function y = -3 - 2x + X2 attain a minimum value?
A.
-1
B.
14
C.
4
D.
1
Correct Answer: 1
Explanation
Given that y = -3 - 2x + X2 then, dy/dx = -2 + 2x At maximum value, dydx = O therefore, -2 + 2x 2x = 2 x = 2/2 = 1
Given that y = -3 - 2x + X2 then, dy/dx = -2 + 2x At maximum value, dydx = O therefore, -2 + 2x 2x = 2 x = 2/2 = 1THIS WEEK's
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