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18 July, 11:54

The average rate of change of the function f (x) = 4x^3 + 4 over the interval [66 ,88 ] is

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  1. 18 July, 14:05
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    Average rate of change = [f (x₂) - f (x₁) ] / (x₂-x₁)

    Interval [66,88] which is x₁=66, x₂=88

    f (x) = 4x³+4

    f (x₁) = f (66) = 4 (66) ³+4=1149988

    f (x₂) = f (88) = 4 (88) ³+4=2725892

    Average rate of change = 2725892-1149988/88-66

    =1575904/22

    =71632
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