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  3. the graph of y8 72x2 4 is concave down f...

Question: the graph of y8 72x2 4 is concave down f...

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The graph of y+8 -72x2 +4 is concave down f 4 + 8x3-72x2 + 4 is concave down for a) -6<x<2 b) x >2 c) x<-6 d) x <-3-3-15 or x>-3+3.5 e) -3-3.5 < x <-3+3/5
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