EC > GATE 2015 SET-2 > Signals and Systems
Consider two real sequences with time-origin marked by the bold value, x1[n] = {1, 2, 3, 0}, x2[n] = {1, 3, 2, 1}. Let X1(k) and X2(k) be 4-point DFTs of x1[n] and x2[n] respectively. Another sequence x3[n] is derived by taking 4-point inverse DFT of X3(k) = X1(k)X2(k). The value of x3[2] is __________.
Correct : 11
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