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What will be the average rate of change of the function [y = 16 – x^2] at x = 4?(a) -8(b) 8(c) -9(d) Depends on the value of xThe question was asked in quiz.Query is from Application of Derivative in section Application of Derivatives of Mathematics – Class 12

Answer»

The CORRECT answer is (a) -8

Easiest explanation: Let, y = f(x) = 16 – x^2

dy/dx = -2X

Now, [dy/dx]x = 4 = [-2x]x = 4

So, [dy/dx]x = 4 = -8



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