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13-08-2021
Mathematics

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The formula S=n(a1+an)/2 gives the partial sum of an artithmetic sequence what is the formula solved for an?

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13-08-2021

Answer:

S = n(a1 + an)/2

2S = n(a1 + an)

2S = na1 + nan

nan = 2S - na1

an = (2S - n a1)/n

Step-by-step explanation:

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