Math, asked by faritha5281, 1 year ago

a1=22 an=(-11) sn=66 then find n

Answers

Answered by dhavaltalaviya1020

1

ANS: 12

An=a1+(n-1)d

-11=22+(n-1)d........(1)

Sn= n/2(44-33).....as above equation

66=n/2(11)

then n=12

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