f(t) = K(t) - K(t-T)
I want to find \frac{df}{dt}
i'm unsure of the notation, does the 3rd term represent K as a function of t-T :facepalm:? I know the 2nd term is showing K is a function of time otherwise it would be written simply Kt, but unsure of the 3rd term. I'm confused :S
If the...