Recent content by zibb3r

Can you guys help with this question? i don't even know where to begin! *Cries* Thanks! I have a test tomorrow and need to learn how to do this type of question! CHEERS!

Thanks but apprantley I have to show it fully as in can't can have it that way/have to show the 2s. Do you have any clue how Id write it that way?

Can anyone give me a hand with this question? I honestly have no idea how to do it? I was thinking for d(A)/dt=-d(B)/dt= -k1(A)+k-1(B) because the 2 on both sides cancels out? But this was completely wrong... Any ideas? :)

Hang on... Does this look ok? dx/dt = 1/2 x + 4 dx/(1/2 x + 4) = dt 2dx/(x+8) = dt 2ln(x+8) = t + C ln(x+8) = (t+C)/2 x+8 = Ce^(t/2) When t = 0, x = 1 So, 1+8 = Ce^0 C = 9 x+8 = 9e^(t/2) x = 9e^(t/2) - 8

I think I've just confused myself more... ! I get what it is, but I'm not really sure how to apply it to this equations; if that makes any sense?

Can anyone help me? I have no idea... I have no idea how to approach this; so figured it was worth a shot asking you guys! Cheers! Using the Principle of Superposition, fi nd the general solution of the differential equation: dx/dt = (1/2)x+4 ; subject to the initial condition...