find the sum of integers from 1to 100 which are multiple of 2 and 5
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find the sum of integers from 1to 100 which are multiple of 2 and 5
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first we have to find out the multiples of2 and 5 from1 ti100....then find the sum
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AP formed will be
(10,20,30......100).
an=a+(n-1)d
100=10+(n-1)10
After solving
n=10
SN=n\2{2a+(n-1)d
Put the values
a=10,n=10,d=10
SN = 550 Ans