do this Question fast 1+2+ ...+50 consecutively
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this is type of AP
hence
sum(1 to n)=n(n+1)/2 sum(1 to 50)=50(50+1)/2
=25×51
=1275 is the answer
arpanbisws:
one more like this only instead of 50 there is 60 can u do that
1830 according to formula
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