Question: 20. For the function f(x) = 4+ 12x- - x', find the local extrema. Then, classify the local extrema using the second derivative test [4

20. For the function f(x) = 4+ 12x- - x', find

20. For the function f(x) = 4+ 12x- - x', find the local extrema. Then, classify the local extrema using the second derivative test [4 Marks] 21. The position-time relationship for a moving object is given by s(t) = kt2 + (6k2 + 10k)t + 2k where k is a non-zero constant. [4 Marks] a. Show that the acceleration is constant. b. Find the time at which the velocity is zero

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