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Please help I cannot get this problem to work. f(x)=3x^4-43x^3+55x^2 f'(x)=12x^3-129x^2+110x Incr...

Please help I cannot get this problem to work.

f(x)=3x^4-43x^3+55x^2 f'(x)=12x^3-129x^2+110x

Increasing and decreasing : increasing (0,0.93),(9.82,infinity) decreasing (-infinity,0),(0.93,9.82) it is still telling me I am wrong I am not sure where I am going wrong.

Concave up and Concave down f''(x)=36x^2-258x

Local Maxima and Local minima

Inflection points

x and y intercepts

math   calculus   
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