Posted by **Jay111** on Monday, November 24, 2008 at 11:47pm.

The critical numbers of the function:

f(t)=7t^(2/3)+t^(5/3)

f'(t)=14/3t^(-1/3)+(5/3)t^(2/3)

I got 0 as a critical number but it is hard for me to factor the f'(t). Whats the other critical number? Thank you.

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