Math, asked by mmasirabasri, 11 months ago

in an AP an=3n+2 find the 12th term...?

Answers

Answered by Moharis287

4

Ans=Sn=3n2-4n

S1=3-4=-1

S2=12-8=4

S3=27-12=15

A.P:-1,5,11,..........

a=-1 , d=6

a12=-1+(12-1)6

= -1+66

=65

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