Multiple choice

The first six points of the 8-point DFT of a real valued sequence are 5, 1 - j3,0,3 - j4, 0 and 3 + j4. The last two points of the DFT are respectively

  1. 0, 1 - j3

  2. 0, 1 + j3

  3. 1 + j3, 5

  4. 1 - j3, 5

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

For 8 point DFT, $\dot x[1] = x[7]; \dot x[2] = x[6]; \dot x[3] = x[5]$ and it is conjugate symmetric about $x[4], x[6] = 0; x[7] = 1 + \beta $