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  • Formula for addition of 1+2+3+4+5................+100 = ?

Formula for addition of 1+2+3+4+5................+100 = ?

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Sum of natural Numbers from 1 to n is given by the formula, 
Sn = n(n + 1)/2 
in this case n = 100 
sum = 100(100 + 1)/2 = 50 × 101 = 5050 

Posted by

Satyajeet Kumar

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