The sum of all natural numbers between 500 and 1000 which are divisible by 13 is
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Step-by-step explanation:
a=507
Tn=l=988
a+(n-1)d=Tn
507+(n-1)13=988
507+13n-13=988
494+13n=988
13n=493
n=38
Sn=n/2 (a+l)
S38=38/2 (507+988)
=19*1495
S38=28405
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