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.	X<sub>1</sub>(ak)+X<sub>2</sub>(bk)
B.	aX<sub>1</sub>(k)+bX<sub>2</sub>(k)
C.	e<sup>ak</sup>X<sub>1</sub>(k)+e<sup>bk</sup>X<sub>2</sub>(k)
D.	None of the mentioned
Answer» C. e<sup>ak</sup>X<sub>1</sub>(k)+e<sup>bk</sup>X<sub>2</sub>(k)

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