Math, asked by hoodaprittam, 8 months ago

4. If an = 550, a = 10, n = 21 find sum of 21 terms

Answers

Answered by ankitakatoch883

1

Answer:

an=550

a=10

n=21

sn=?

Step-by-step explanation:

sn=n/2[a+an]

sn=21/2[10+550]

sn=21/2[560]

sn=21×280

sn=5880

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