Math, asked by chaituP123, 1 year ago

Solve 15b.I will mark u brainliest

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Answers

Answered by anirudhsingh87

12,15,18 ....99
a=12
d=3
l=99

l=a+(n-1)d

99=12+(n-1)3
29=n-1
n=30..
Sn=n/2(a+l)

= 15(12+99)
=1665..Ans

Hope its helps u!!!❣️❣️

anirudhsingh87: Ab toh krdo please

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