Compute the length of the curve r(t)=<2t,ln(t),t^2> from 1 to 2 i found r'(t), i just need help finding the square root of (4+1/t^2+4t^2) thanks in advance!
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$\displaystyle 4t^2 + \frac{1}{t^2} + 4 =$ $\displaystyle \frac{4t^4 + 1 + 4t^2}{t^2} =$ $\displaystyle \frac{(2t^2 + 1)^2}{t^2}$
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