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QUESTION
#7 Consider the function f(x)=12x 5 +60x 4 100x 3 +6 .
#7Consider the function f(x)=12x 5 +60x 4 −100x 3 +6 . f(x) has inflection values at (reading from left to right) x=D , E , and F For each of the following intervals, tell whether f(x) is concave up (type in CU) or concave down (type in CD).
Solution: Hence Points of consideration are: 0,-3.68, 0.68D=-3.68;E=0; F=0.68X<-3.68Let x=-4From (-∞, -3.68]-3.68<x<0Let x=-1 concave down (CD) From [ -3.68,0]0<x<0.68Let...