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Maths Puzzle
derive sum of digits of n terms
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- sum of frst n natural numbers is n(n+1)/2
- 10 years agoHelpfull: Yes(2) No(1)
- Let term is a, common difference is 1
Sum of arithmetic progression is n/2*(2a+n-1)
If we need to find sum of FIRST n natural numbers ( not really specified in q)
Then put a=1 to obtain n(n+1)/2 - 10 years agoHelpfull: Yes(0) No(0)
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