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Question

If A=200020002 such that A5 = λA, then λ = ___________.

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Solution


The given matrix is A=200020002.

A2=A.A=200020002200020002=4+0+00+0+00+0+00+0+00+4+00+0+00+0+00+0+00+0+4=400040004

A4=A2.A2=400040004400040004=16+0+00+0+00+0+00+0+00+16+00+0+00+0+00+0+00+0+16=160001600016

A5=A4.A=160001600016200020002=32+0+00+0+00+0+00+0+00+32+00+0+00+0+00+0+00+0+32=320003200032

Now,

A5=320003200032=16200020002

A5=16A

It is given that, A5 = λA.

∴ λ = 16

If A=200020002 such that A5 = λA, then λ = ____16____.

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