find the maximum value of
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Answer:3
Step-by-step explanation:let y=16x-13-4x^2
dy/dx=16-8x
Explaination by coordinate:The equation of y is a parabola with coefficient of x^2 negetive so the point at which the slope is zero is maxima therefore at x=2 we get maxima ,i.e., y=16*2-13-4*2^2=32-13-16=3
General explanation: dy/dx =0 so x=2 is a point of extremity and we get d2y/dt2 =-8 so it will have only a maximum value as the slope continuously decreases and that is at x=2 so the answer is y=3
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