1-calculate-dx-x-1-x-2-x-n-n-integr-natural-2-find-the-value-of-U-n-n-1-dx-x-1-x-2-x-n-

Question Number 130684 by mathmax by abdo last updated on 28/Jan/21

1) calculate \int \frac{dx}{(x - 1) (x - 2) \dots . (x - n)} (n integr natural)

2) find the value of U_{n} = \int_{n + 1}^{\infty} \frac{dx}{(x - 1) (x - 2) \dots . (x - n)}