Signals and Systems Lec-22: Fourier Series- 6

In this Lecture, i solved problems on Discrete-Time Fourier Series.

[RudranathSanyal]

sir, at 20:31 you used the formula
{e^ -jk(2.pi/N)}^n
bt the actual formula is
{e ^-jk(2.pi/N).n}
and n is replaced by (p -n1)
it should be, {e ^-jk(2.pi/N).(p-n1)}

[swatisinha]

in question no 1, Question is given in the form of polar and sine form, then how we will get to know that we have to proceed using complex exponential form?

[akshayalk]

@ 26:34 we should differentiate wrt k orN? Whether we diff wrt k or N ans remains same...

[RohitKumar-ylsk]

At 26.00 to find the value of ak at k=0, while using LH rule we need to differentiate wrt k or N????

[swagatika]

at 18.52 how to decide d period N/2or N

[swagatika]

in question the series is AO, AK...BUT UR DERIVING EXPRESSION S WITH ao, ak r d notations same or different

[mdkalimullah]

Discrete fourier series is only for periodic signal and dft is for aperiodic signal. M I right sir