engineering recuitment BHEL Engineer Trainee Mock Test 2025 Signals and Systems Discrete Time Signals and Systems Characteristic of Signals
यदि x(t) एक करणीय सिग्नल है, तो t < 0 के लिए:
1
x(t) < 0
2
x(t) शून्य के बराबर नहीं है
3
0 < x(t) < 0
4
x(t) = 0