The variance of a random variable X is $$\sigma _x^2\,.$$ Then the variance of - kx (where k is a positive constant ) is

In the signal flow graph shown in fig X₂= TX₁ where T is equal to

For the system shown in figure the transfer function $$\frac{\mathrm C\left(\mathrm s\right)}{\mathrm R\left(\mathrm s\right)}$$ is equal to

A system has fourteen poles and two zeroes. Its high frequency asymptote, in its magnitude plot, has having a slope of