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Niech I_n = integrate x^n e^x dx . Pokaż, że I_n = x^n e^x - n I_(n-1) i użyj wzoru do obliczenia
Niech I_n = integrate x^n e^x dx . Pokaż, że I_n = x^n e^x - n I_(n-1) i użyj wzoru do obliczenia
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