kw21fic718 kw21fic718

03-11-2022
Mathematics

Answered

The formula S--
an-
n(a₁ + a)
2
O an-
2S-a,n
n
2S+ a₁n
n
Oan-2S+an+n
Oan-2S-a₁n+n
gives the partial sum of an arithmetic sequence. What is the formula solved for an?

Answer :

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