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GATE Electrical 2017 Set 1 | Question: 3

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Let $z(t) = x(t) *y(t)$, where "*" denotes convolution. Let $c$ be a positive real-valued constant. Choose the correct expression for $z(ct)$.

  1. $c . x(ct) * y (ct)$
  2. $x (ct) * y (ct)$
  3. $c . x (t) * y(ct)$
  4. $c . x (ct) * y(t)$
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