The sum of the A.P, 1+2+...+ 10 is .......
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Answered by
17
55 is the answer to the question
Answered by
31
Sn=n/2[a+an]
a=1
an=10
n=10
Sn=10/2(1+10)
Sn=5(11)
Sn=55
Hence proved
a=1
an=10
n=10
Sn=10/2(1+10)
Sn=5(11)
Sn=55
Hence proved
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