Math, asked by lilmag8248, 8 months ago

If a=8, an=62, Sn=210 then find n and d?

Answers

Answered by anjalikumari1642

1

Answer:

sn=210

sn=n/2(a+l)

210=n/2(8+62)

n/2×70=210

n=210×2/70=3×2=6.

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