find sum pf forst 50 natural numbers if a=1 d=3
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as the sum is given by n/2(2a+(n-1)d)
here n=50;a=1;d=3
putting the values
50/2(2+(49)*3)
3725 is the required sum
here n=50;a=1;d=3
putting the values
50/2(2+(49)*3)
3725 is the required sum
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