$\displaystyle \int_0^{\infty} x^{10} e^{-\frac{90}{x}} dx$
$\displaystyle \int_0^{\infty} x^{11} e^{-\frac{90}{x}} dx$
Is there a shortcut to seeing that the top equation divided by the bottom equation is equal to 10?
$\displaystyle \int_0^{\infty} x^{10} e^{-\frac{90}{x}} dx$
$\displaystyle \int_0^{\infty} x^{11} e^{-\frac{90}{x}} dx$
Is there a shortcut to seeing that the top equation divided by the bottom equation is equal to 10?