To verify that sum of first n natural number is n(n+1)By 2 by graphica

1.	To verify that sum of first n natural number is n(n+1)By 2 by graphical method
Answer» sum of n natural nos are 1+2+3+4+.......+.na = 1d=1we know that Sn=n/2(2a+(n-1)d)Sn=n/2(2+n-1) =\xa0{tex}n(n+1) \\over 2{/tex}

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