Question

prove that the sum of first n even number is n².​

Answer 1

Answer:

(1) If n is even in the above, n² will be even too. This way the sum of 2 non zero even numbers = n² + n , which is even. (2) If n is odd , n² will be odd too. So, the sum of 2 non zero odd numbers also = n² +n, which is even.

Step-by-step explanation:

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