12. (9 pts) Consider the function f(x)=x + 3x? -9x+7. Determine the intervals on which f(x) is increas- ing/decreasing a

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12 9 Pts Consider The Function F X X 3x 9x 7 Determine The Intervals On Which F X Is Increas Ing Decreasing A 1 (26.12 KiB) Viewed 33 times

12. (9 pts) Consider the function f(x)=x + 3x? -9x+7. Determine the intervals on which f(x) is increas- ing/decreasing and find the points of local (relative) maximum/minimum, if any. f(x) is increasing on: (x) is decreasing on: point(s) of local (relative) minimum at x = point(s) of local (relative) maximum at x = 13. (9 pts) Find all intervals where the function /(x) only for x > 0.) +8In(x) is concave up. (Note/(x) is defined concave up on: 5