f(x) = 3x^4 - 4x^3
f'(x) = 12x^3 - 12x^2
f''(x) = 36x^2 - 24x
Can you please teach me how to find increasing decreasing concave up/down infection points?

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@rulnick

@Mertsj @zzr0ck3r

First let us factorize the original function and find its roots

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