English, asked by jyotikumari169826, 9 months ago

find the sum of first 15

Answers

Answered by TIMEISLESS

0

Answer:

1+2+3+4+5+6+7+8+9+10+11+12+13+14+15=120

Answered by Aikanshkr

0

Answer:

120

Explanation:

an=15

sn=?

n/2(a+l)

15/2(1+15)

=120

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