Okay so another Calc 1 question, I don't need an answer, just a push in the right direction.

Find the given quantity. The error function, erf(x), is defined by: http://gyazo.com/eacde33ea0992f718405f2537a3992cf

Question

Okay so another Calc 1 question, I don't need an answer, just a push in the right direction.

Find the given quantity. The error function, erf(x), is defined by: http://gyazo.com/eacde33ea0992f718405f2537a3992cf

anonymous · Answer

Hint: $\large \displaystyle \frac{d}{dx}\left[\int_a^{g(x)}f(t)\,dt\right] = f(g(x))\cdot g^{\prime}(x)$ by chain rule & the fundamental theorem of calculus.

Can you take things from here? :-)

anonymous · Answer

I think so. If I use your strategy that would give me $$e ^{-x ^{18}}(9x ^{8})$$ And thanks by the way.

anonymous · Answer

Yes thats correct, thanks once again!