# Math Help - Kindly tell me which option is correct and what is reason for that

1. ## Kindly tell me which option is correct and what is reason for that

Kindly tell me which option is correct and what is reason for that

2. ## Re: Kindly tell me which option is correct and what is reason for that

Why not try $x(t) \equiv 0$ and see what you come up with.

3. ## Re: Kindly tell me which option is correct and what is reason for that

so option (b) is correct

Am i right

4. ## Re: Kindly tell me which option is correct and what is reason for that

Why post here if you ignore the responses? Danny suggested you try x(t)= 0. That would give, of course, $a_k= 0$ for all k. And y(t)= 1 so $b_0= 1$ while $b_k= 0$ for all k> 0. That does not match "b".