Correct Answer - Option 4 : 3
Given that,
x(t) and y(t) have same fundamental period of 3 seconds.
z(t) = x(-t) + y(2t + 1)
Time period of x(t) = 3
Time period of x(-t) = 3
Time period of y(t) = 3
Time period of \(y\left( {2t + 1} \right) = \frac{3}{2} = 1.5\)
Time period of z(t) = LCM of (3, 1.5) = 3