Question: In Exercises 21 and 22, find (a) r'(t), (b) r''(t), (c) r'(t) r''(t), and (d) r'(t) x r''(t). r(t) = 2t 3 i +

In Exercises 21 and 22, find (a) r'(t), (b) r''(t), (c) r'(t) ยท r''(t), and (d) r'(t) x r''(t).

r(t) = 2t3i + 4tj - t2k

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