GATE ECE 1993 | Question 6.4

Question

If $\tau \mathrm{F}(\mathrm{s})=[f(t)]=\frac{\mathrm{K}}{(\mathrm{s}+1)\left(\mathrm{s}^{2}+4\right)}$ then $\lim _{t \rightarrow \infty} f(t)$ is given by

• A. $\mathrm{K} / 4$
• B. zero
• C. infinite
• D. undefined