Signals and Systems - Engineering
A
L [af1(t) + bf2(t)] = aF1(s) + bF2(s)
B
L [af1(t) + bf2(t)] = aF1(s) - bF2(s)
C
L [af1(t) + bf2(t)] =[aF1(s)]/[bF2(s]
D None of the above
ANS:A - L [af1(t) + bf2(t)] = aF1(s) + bF2(s)
£f(t) = 
£-1F(s) = f(t)
£[a f1(t) + bf2(t)] = aF1(s) + bF2(s)
where 
£[f(t - T)] = e-sT F(s)
£[e-at f(t)] = F(s + a)
Initial value theorem 
Final value theroem 
Convolution Integral 
where t is dummy variable for t.
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