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How do you fund the fastest increase rate on a function like f(x) = 2cos(2x) ?

How about a rational function?
Thanks!
9 years ago

Answers

Steve
fastest increase rate is where the slope is steepest. That is, you want a maximum for f'(x). That happens where f"(x) = 0

f = 2cos(2x)
f" = -8cos(2x)
f"=0 when x=π/4, 3π/4 and so on.

The slope is negative at π/4, so you want x = 3π/4

A look at the graph confirms that the slope is greatest there.

http://www.wolframalpha.com/input/?i=2cos(2x)
9 years ago

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