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May 27, 2016
Posted by **ladybug** on Sunday, November 18, 2012 at 11:31pm.

f(x)=4x^3+3x^2-8x+7;[-5,-2]

please show all work

- college algebra, Please help!! -
**Steve**, Monday, November 19, 2012 at 4:46amf(-5) < 0

f(-2) > 0

somewhere in there f(c) = 0 since f(x) is continuous.