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Use logarithmic differentiation to find the derivative of the function.

y = x^(8cosx)

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y = x^(8cosx)
lny = 8cosx lnx
1/y y' = 8(-sinx lnx + 8/x cosx)
y' = 8 x^(8cosx) (8/x cosx - sinx lnx)

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