Math, asked by aabhishekhampannavar, 1 month ago

if an= 2n^2+1 then find S9

Answers

Answered by sreeh123flyback

0

Step-by-step explanation:

an= 2n²+1

a1= 3

a9= 163

S9=9/2(163+3)=9×166/2=9×83= 747

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