1+2+3+4+5+.......+10
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Answered by
1
S 10 =10/2 (2 + 9 )
s10 = 5 × 11= 55
s10 = 5 × 11= 55
Answered by
1
n= natural no.
formula=n×(n+1)/2
n=10
=10×(10+1)/2
=110/2
=55
formula=n×(n+1)/2
n=10
=10×(10+1)/2
=110/2
=55
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