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1. |
If X1(k) and X2(k) are the N-point DFTs of X1(n) and x2(n) respectively, then what is the N-point DFT of x(n)=ax1(n)+bx2(n)? |
A. | X1(ak)+X2(bk) |
B. | aX1(k)+bX2(k) |
C. | eakX1(k)+ebkX2(k) |
D. | None of the mentioned |
Answer» C. | |