I have a function here...(adsbygoogle = window.adsbygoogle || []).push({});

r(t) ={6Sqrt[2]t, 3Exp[2t], 3Exp[-2t]}

I needed to find the norm of r'[t]... yet when Mathematica tries to simplify it, it can't do it with simplify, powerexpand[simplify[]], fullsimplify... and this function IS suppose to be able to simplify. I then started running through every basic algebraic manipulation tool and came up empty...

I restarted mathematica thinking the kernel had just given up on me but that didn't work.

PowerExpand[Simplify[]] gives me 12Cosh[2Re[t]] and that can't be it...

Someone think they know what's going on here?

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# Mathematica can't simplify

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