a) 0.1/(1+0.9ejω)
b) 0.1/(1+0.9e-jω)
c) 0.1/(1-0.9ejω)
d) None of the mentioned
If the low pass filter described by the difference equation y(n)=0.9y(n-1)+0.1x(n) is converted into a high pass filter,
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If the low pass filter described by the difference equation y(n)=0.9y(n-1)+0.1x(n) is converted into a high pass filter,
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