Jennifer has to purchase a new car and wants to finance at most 3 4 of the total cost of the car (purchase price plus interest).
2 answers:
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By the chain rule,
It looks like we're given
where <em>a</em> and <em>b</em> are presumably constant.
Recall that
so that
Then we have
where the last reduction follows from dividing through everything by and simplifying.
I'm not sure at which point you're supposed to evaluate the derivative (22/7*4, as in 88/7? or something else?), so I'll leave that to you.
