Question

the sum of first n natural numbers is​

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

Answer:

Sum of the First n Natural Numbers

We prove the formula 1+ 2+ ... + n = n(n+1) / 2, for n a natural number. There is a simple applet showing the essence of the inductive proof of this result.

Step-by-step explanation:

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