So i have to show that there is no minimum. thus i have to differentiate the function, which apparently gives this I don't know how they got that answer , can someone please explain?
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Originally Posted by el123 So i have to show that there is no minimum. thus i have to differentiate the function, which apparently gives this I don't know how they got that answer , can someone please explain? use the power rule ... rewrite ... note there is no "cube" root in the denominator of the last term.
Thanks.
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