Question

Show that n^2 – 3n is divisible by 2 for every natural number.

Answer 1

let n=1

so n²-3n
1²-3(1)=(-2) and it is divisible by 2

similarly take n=2

now,2²-3(2)
=4-6=(-2)

it is also divisible by 2 since all natural numbers in equation n²-3n is divisible by2

Answer 2

that is your answer.......

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