MathematicsDifferentiationJAMB
Find the maximum value of y = 4x − x².
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Answer: A. 4
dy/dx = 4 − 2x = 0 at x = 2; y = 8 − 4 = 4 (a maximum, since the x² coefficient is negative).
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.