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Question

Consider the discrete time signal

x(n)=(13)nu(n),whereu(n)={1,n00,n<0
and y(n)=x(n), <n<

Then n=y(n) is______.
  1. 1.5

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Solution

The correct option is A 1.5
Given, x(n)=(13)nu(n):n0

y(n)=x(n)=(13)nu(n).n0

n=y(n)=n=(13)nu(n)

=0n=(13)nu(n)=11(13)=12/3=32=1.5

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