if t1=5, t11=55 then find sum of first 11 terms.
Answers
Answered by
0
heya your answer.................................
Attachments:
roh4:
mark me brainlest
a+10d=55 how ?
a= first term and a+d= second term. a+2d =third term and so on so a+10d =eleventh term (this is style formula) and eleventh term is55 so a+10d =55
hope it helps
plz mark craze4study BRAINLIEST
hiii
Answered by
2
here is ur ans
a=5
a+10d=55
5+10d=55
10d=50
d=5
Sn=n/2(2a+(n-1)d)
sn=11/2(10+10*5)
=11/2(60)
=11*30
=330
hope it helps
mark BRAINLIEST
a=5
a+10d=55
5+10d=55
10d=50
d=5
Sn=n/2(2a+(n-1)d)
sn=11/2(10+10*5)
=11/2(60)
=11*30
=330
hope it helps
mark BRAINLIEST
I had told u in other answer comment box
plz mark BRAINLIEST
thanks for selecting BRAINLIEST
hlo
thanks
hmm what??
tell which state u r
Similar questions