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Question

If A=[1 0 2 1 ], then by the principle of Mathematical induction, prove that An=[102n1].

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Solution

Since, A=[1201]

Let P(n):An=[12n01]....(i)

P(1):A=[12.101]=[1201]

P(n) is true for n=1.

Let P(n) is true for n=k.

P(k):Ak=[12k01]...(ii)

Now, P(k+1):Ak+1=[12(k+1)01]....(iii)

Ak+1=Ak×A1=[12k01][1201]

=[12(k+1)01]

P(n) is true for n=k+1.

Hence, P(n) is true for all nN.

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