If X1(k) and X2(k) are the N-point DFTs of x1(n) and x2(n) respectivel – McqOptions

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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.	e<sup>ak</sup>X1(k)+e<sup>bk</sup>X2(k)
D.	None of the mentioned
Answer» C. e<sup>ak</sup>X1(k)+e<sup>bk</sup>X2(k)

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