sum of all odd numbers upto 85
Answers
Answered by
13
1,3,5....85
S85=n÷2(2a+{n-1}d)
so a=1 d=2 n=43..
now u can do it
S85=n÷2(2a+{n-1}d)
so a=1 d=2 n=43..
now u can do it
Answered by
3
a=1 ,d=1
n=85
sn= n/2{2a+(n-1)d}
85/2{2+84}
85×43=3655
n=85
sn= n/2{2a+(n-1)d}
85/2{2+84}
85×43=3655
nishant45:
is it correct
Similar questions