# Using the princip

To Prove: Let us prove this question by principle of mathematical induction (PMI)

Let P(n): For n = 1

LHS = RHS = Hence, LHS = RHS

P(n) is true for n = 1

Assume P(k) is true

= ……(1)

We will prove that P(k + 1) is true

RHS = LHS = = [ Writing the second last term ]

= [ Using 1 ]

= = = ( Splitting the numerator and cancelling the common factor)

= RHS

LHS = RHS

Therefore, P (k + 1) is true whenever P(k) is true.

By the principle of mathematical induction, P(n) is true for

where n is a natural number

Hence proved.

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