Write the Word or Phrase That Best Completes Each Statement $\int \frac{e^{x}}{e^{2 x}-16} d x$

Essay

Write the word or phrase that best completes each statement or answers thequestion.
-A student sees $\int \frac{e^{x}}{e^{2 x}-16} d x$ worked on the board using $-\int \frac{d u}{a^{2}-u^{2}}$ , where $u=e^{x}$
and $d u=e^{x} d x$ . The student sees $\int \frac{e^{x}}{e^{x}-9} d x$ on a test. Can the same formula be used?