Question

Find the value of [u(t) – d(t-1)] * -x[t+1].

(a) (dollarSign)x(t+1) – x(t)

(b) x(t) – (dollarSign)x(t+1)

(c) (dollarSign)x(t) – x(t-1)

(d) (dollarSign)x(t-1) – x(t+1)

This question was posed to me in a job interview.

This question is from Continuous Time Convolution topic in division Time-Domain Analysis of CT Systems of Signals and Systems

Answer 1

Correct choice is (b) x(t) – $x(t+1)

The explanation: The delta function convolved with another function results in the shifted function.