Question

Is the above function defined, causal in nature?

(a) True

(b) False

I have been asked this question by my college professor while I was bunking the class.

Enquiry is from Discrete Time Signals topic in chapter Signals and Systems Basics of Signals and Systems

Answer 1

The correct choice is (a) True

To explain I would say: As the value of the function depends solely on the value of the input at a time presently and/or in the past, it is a causal system.