Question

ap 10.20.30.......130 total sum

Answer 1

a=10
d=20-10=10

Now
An=a+(n-1)d
→130=10+(n-1)10
→130-10=(n-1)10
→120/10=n-1
→12=n-1
n = 13


So

Sum =S13=(13/2)(10+130)
=(13×140)/2
=13×70
=910


i hope you Understand....

Regards,
Leukonov.

Answer 2

Hey Mate

Here Is Answer To Your Question

Hope It Might Helped You

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Regards Vishal______(BhamBhamBhole)