February 2019 0 40 Report
Ciąg (an) określony jest wzorem an = n² + 2n. Wówczas:
A) a n+1 = n² + 2n + 1
B) a n+1 = n² + 2n + 2
C) a n+1 = n² + 4n + 2
D) a n+1 = n² + 4n + 3
Proszę o obliczenia ;)
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