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Question

If A=102222341
such that A1=pA2+qA+rI, then(p,q,r)=

A
(1,0,2)
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B
(1,1,3)
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C
(1,1,5)
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D
(16,0,56)
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Solution

The correct option is D (16,0,56)
A2=5848122243A3=101010161015201

A1=pA2+qA+rII=pA3+qA2+rA

100010001=p101010161015201+q5848122243 +r102222341

1=p5q+r ...(1)0=0×p8q+0×r ...(2)0=10p4q2r ...(3)

Solving eqn (1),(2) and (3), we get
p=16, q=0, r=56

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