Calculus

The graph of f(x)=x^3-3x^2-24x+1 is concave up when x<-2, x<4, x>-6, or x>1?

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  1. what exactly did you not understand about this?

    You have to do some of the thinking here, otherwise, you are mostly answer grazing.

    http://www.jiskha.com/display.cgi?id=1309223857

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