TLS Online TPP Program

#Question id: 15399


If I(s) = 3s/ (s+1)(s+4), then i(t) is 

#Section 1: Engineering Mathematics
  1. e-t + 4e-4t 
  2. e-t + 4e4t 
  3. -e-t + 4e-4t 
  4. -e-t - 4e-4t