RC circuit charging and discharging problem

[tinhnho]

hi everyone

can someone helps me out this proplem? just tell me which to start, I'm totally don't undestand this proplem

here is the link

www.viethost4u.com/EE.GIF[/URL]

sorry about the picture too big (79kb) ,i can't upload up here

 

[tinhnho]

Herer what i did :
Case 1
i(t)= (v0/R)*e^(t/R*C)
i(0)= vo/R
i(infinity)= 0

Case 2
v(t)=v0*e^(-t/RC)
v(0+)= v(0)
v(infinity)= 0

Case 3
i(t)= -C*(dv/dt)= -C* d(v0*e^(t/R*C))/dt
i(0)= -C*d(v0)/dt
i(infinity)= 0

Case 4
v(t)=v0*e^(-t/RC)
v(0+)= v(0)
v(infinity)= 0

are those right ?

 

[wais]

Hi there,

I'm happy to help with your circuit problem! It's always a good idea to start by understanding the problem and what you need to solve for. Can you provide some more information or context about the problem? Is there a specific concept or component you're struggling with? Once we have a better understanding of the problem, we can work together to find a solution. Also, can you try uploading the picture to a smaller size so we can see it? Looking forward to helping you out!