Math, asked by vinay1234189, 10 months ago

please solve this question

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Answers

Answered by reachmeatsuraj21

0

Answer:

Step-by-step explanation:

Sn=210

Sn+1=253

n/2(2a+(n-1)d=210

n+1/2(2a+(n+1-1)d=253

but the steps are too long

so, the exact answer would be 86/2=43

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