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Principle of Mathematical Induction — quick quiz

3 WBJEE-pattern questions on Principle of Mathematical Induction. Instant scoring and solutions, no signup — see where you stand in a few minutes.

Question 1 of 3

Hard

To prove 1 + 2 + 3 + ... + n = n(n+1)/2 by induction, if the statement is true for n = k, we must show it holds for: