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Find the slope of the tangent line to the curve:
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\[y=\int\limits_{0}^{\sqrt{x}} e ^{-t^2} dt (x>0) at x=4\]
take the derivative using the chain rule. the derivative of the integral is the integrand, but this time the upper limit is \[\sqrt{x}\] so you have to replace t by \[\sqrt{x}\] and also multiply by the derivative of \[\sqrt{x}\]
\[y'=e^{-(\sqrt{x})^2}\times \frac{1}{2\sqrt{x}}\]
oh yeah i got that
then we simply plug in 4 right
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good so we get \[y'=e^{-x}\times \frac{1}{2\sqrt{x}}\]
plug in 4 get out \[\frac{e^{-4}}{4}\]
and that would be our slope right
yup!
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