Let f(x) = (2x-pie) 3 +2x - cosx. Then show that d[ f -1 (x)] / dx at x=pie/2 is 1/3.
Let f(x) = (2x-pie) 3 +2x - cosx. Then show that d[ f -1 (x)] / dx at x=pie/2 is 1/3.
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