what is the sum of first 15 items of a.p.5,10,15...?
Answers
Answered by
2
Answer:
an=a+(n-1)d
A10=5+(9)5
=5+45
=50
sn=n/2(a+l)
10/2(2+50)
5(55)=275
Step-by-step explanation:
The answer is 275
Do follow me and do mark as brainliest..
Answered by
5
by using formula of sn
hope it helps
of my answer is right then please follow me
i shall be thankful
Attachments:
Similar questions