Question: Given f ( x ) = 5 x 3 - 3 0 x 2 + 1 5 x - 1 2 , find the intervals

Given f(x)=5x3-30x2+15x-12, find the intervals where the graph of f is concave upward, the intervals where the graph is concave downward, and the inflection points.
Given f ( x ) = 5 x 3 - 3 0 x 2 + 1 5 x - 1 2 ,

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