Question

use principle of mathematical induction to prove the above question​

Answer 1

Let f (n) = n^2 -2n .

After noting f (3)>0 , we suppose that f (n)>0.

Now,

f (n+1) = (n+1)^2 -2 (n+1)

=n^2 + 2n - 2n -2

= f (n) + 2n -2 > 0

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Answer 2

Answer:

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