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4) Graphing polynomials Sketch a graph of f(x) = x* + 4x3. (10 pts) D .
C Not Secure Vizedhtmlcontent. next.ecollege.com d) Find critical points and possible inflection points. e) Find intervals on
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C FCx) = x+ + 4x3 Fing coitical poine F(X) = 0 F(x) = (x++ 4x3) = 4x +4(3x3) =0 Flex) = 4x3+12x²=0 4x*(X+3) =0 =0, x=-3) Fu120++ 24x = 0 128 C x+2) = => 1x=0, x=-2 Fux) monoto to Inflection point Fix sign Internal. -~< X <-2,-24 XLO, OLX<co now che

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