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Find Vc(t) using first order circuits

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linux-howto

http://forum.allaboutcircuits.com – I am doing a homework problem to solve for the voltage across the capacitor. Our teacher gave us a seven step method to solve for them and told us not to worry about the differential equation way right now. Attachment 61322 We have to find the Vc(t) when t < 0 and when t = ∞. I can find Vc(t) when t = ∞ easy enough but when I try to find when t < 0 I am not getting the right answer according to the book. I try to simplify the circuit down and get a resistance of 4K to the left and then a single resistor to the right of 2k. Once I have that I use voltage division to get th (Embedded)