I am confuse a question state f(x) = (ln x )^2 .... i skip a part..(adsbygoogle = window.adsbygoogle || []).push({});

show that f'' (x) = 0 (not concern with the answer but what does f'' means is it that i have to differenciate twice or integrate twice..??)

my second question: how to differenciate y = (ln x )^2

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# Homework Help: Differenciate twice or integrate twice?

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