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# Use the guidelines of this section to sketch the curve.$y = e^{2x} - e^x$

## Graph will be concave up when $y^{\prime \prime}>0,$ that is when $x \in\left(\ln \frac{1}{4}, \infty\right)$Graph will be concave down when $y^{\prime \prime}<0,$ that is when $x \in\left(-\infty, \ln \frac{1}{4}\right)$

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