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 the voltage across

**Vc(t) = 4V**but the book is saying its 12V and i am just not sure why or where I am going wrong. Any help or explanation would be appreciated.