Question: In Exercises 7376, determine whether the statement is true or false. If it is false, explain why or give an example that shows it is

In Exercises 73–76, determine whether the statement is true or false. If it is false, explain why or give an example that shows it is false.


If r and u are differentiable vector-valued functions of t, then


d dt [r). [r(t) u(t)] = r'(t). u'(t).

d dt [r). [r(t) u(t)] = r'(t). u'(t).

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