What is the sum of all odd numbers from 11 to 60?
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yashvardhanborude4:
Sorry it is wrong
Answer is 875
check it correctly
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ohh sorry mine is wrong
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T1=a=11......as 1st odd no. is 11
Tn=59.........as last odd no. is 59
d=2
tn=a+d(n-1)
59=11+2(n-1)
59=11+2n-2
59-11=2n-2
59-11+2=2n
50=2n
n=50/2
n=25
so there are total 25 odd no.
sn=n/2(T1+TN)
sn=25/2(11+59)
sn=25*70/2
sn=25*35
so sn=875.....
I hope this will help you......☺
Tn=59.........as last odd no. is 59
d=2
tn=a+d(n-1)
59=11+2(n-1)
59=11+2n-2
59-11=2n-2
59-11+2=2n
50=2n
n=50/2
n=25
so there are total 25 odd no.
sn=n/2(T1+TN)
sn=25/2(11+59)
sn=25*70/2
sn=25*35
so sn=875.....
I hope this will help you......☺
And to find their total sum of odd no.(formula)
In this problem which formula did you use
Thanks very much
What is the farmula in this ex??
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