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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 ∫ (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)))
$$\left.\mathrm{1}\right)\mathrm{calculate}\:\int\:\frac{\mathrm{dx}}{\left(\mathrm{x}−\mathrm{1}\right)\left(\mathrm{x}−\mathrm{2}\right)….\left(\mathrm{x}−\mathrm{n}\right)}\:\:\:\left(\:\mathrm{n}\:\mathrm{integr}\:\mathrm{natural}\right) \\ $$$$\left.\mathrm{2}\right)\:\mathrm{find}\:\mathrm{the}\:\mathrm{value}\:\mathrm{of}\:\:\mathrm{U}_{\mathrm{n}} =\int_{\mathrm{n}+\mathrm{1}} ^{\infty} \:\frac{\mathrm{dx}}{\left(\mathrm{x}−\mathrm{1}\right)\left(\mathrm{x}−\mathrm{2}\right)….\left(\mathrm{x}−\mathrm{n}\right)} \\ $$

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