September 2018 1 31 Report
Jak z nawiasu (n+1)! wyciagnac n! przed nawias?

np.
(3^n)*3*n! - (3^n)(n+1)!
i z tego poprzez wyciagniecie przed cale wyrazenie uzyskano:
(3^n)n!*(3-n-1)

w jaki sposob do tego doszlo?
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