2.7 Consider a CT linear system. Its zero-state responses excited by u, and u₂ are shown in Fig- ure 2.25(a). Is the system time-varying or time-invariant? Can you find the zero-state responses excited by the inputs u3, u4, and us shown in Figure 2.25(b)? 134 2 والا h. h... 012 124 y24 12 345 123 5 0 4 561 (a) 1 3 0 012 3 4 56 2 -1+ (b)

Signals and systems

Find the steady-state currents and Voltages for the circuit shown. Alt R₁ R3 www 000 wwwroo 252 E 50 V 4₁. R₂: икк C₁2 10 5Ω G + >1 www L2RA C₂2 40 +21 www Rs 702

2.38. A system is governed by the differential equa- tion dy dt dx + ay = b + cx dt (a) Find H(f). (b) Find and plot |H(f) (c) Find and plot |H(f) and/H(f) for c = 0. and /H(f) for b = 0.