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For the curve y = 5x – 2x^3, if x increases at the rate of 2 units/sec, then how fast is the slope

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For the curve y = 5x – 2x3, if x increases at the rate of 2 units/sec, then how fast is the slope of curve changing when x = 3?

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Slope of curve

Thus, slope of curve is decreasing at the rate of 72 units/sec when x is increasing at the rate of 2 units/sec.

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