text: ## 10 Reputation
  
  10 years, 319 days
  
  ## new one...
  
  Ok what if the equation is:
  
  L * di/dt + (R1+R2)i + q/C = U
  
  L = 4
  R1 = 8
  R2 = 6
  C = 4
  u= 10cos8t
  
  i(0) = 1
  i´(0) = 1
  
  I must calculate i(t) and plot the answer i.
  
  ## new one...
  
  Ok what if the equation is:
  
  L * di/dt + (R1+R2)i + q/C = U
  
  L = 4
  R1 = 8
  R2 = 6
  C = 4
  u= 10cos8t
  
  i(0) = 1
  i´(0) = 1
  
  I must calculate i(t) and plot the answer i.
  
  ## @Carl Love  i(0) = 0q(0) = 2 the an...
  
  i(0) = 0
  q(0) = 2
  
  the answe should be:
  q(t) = -3e-3 + 4e-2t + e-t
  
  Is it possible to solve and plot?
  
  ## thank you....
  
  Thank you. I appreciate it.
  
  a) How can i use laplacetransform to solve the equation reference to i1, i2, i?
  
  i1 = i2 + i
  2i1 + i2 + 2i1 = 30 + 20cos5 + 114sin5
  1/50 i3 + 4i3 - 2 i2 = 0
  
  i1(0) = 0
  
  i2(0)=0
  
  i3(0)=0
  
  b) Plott the equation.
  
  ## thank you....
  
  Thank you. I appreciate it.
  
  a) How can i use laplacetransform to solve the equation reference to i1, i2, i?
  
  i1 = i2 + i
  2i1 + i2 + 2i1 = 30 + 20cos5 + 114sin5
  1/50 i3 + 4i3 - 2 i2 = 0
  
  i1(0) = 0
  
  i2(0)=0
  
  i3(0)=0
  
  b) Plott the equation.
  
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