- #1
Andrusko
- 44
- 0
I'm having trouble seeing how an example comes out because the "worked example" skips about 5 steps and I can't get from point a to b.
It starts as:
[tex] \frac{\frac{d}{dt}(\frac{3t^{2}-3}{3t^{2}-6t})}{3t^2-6t} [/tex]
and is meant to end up as:
[tex] \frac{-2(t^{2}-t+1)}{3t^{3}(t-2)^{3}} [/tex]
I end up with a mess looking nothing like that and I suspect it's because I've missed some cunning common factor that is easy to spot provided you've already done the problem.
I used the quotient rule for the top part.
[tex] \frac{u}{v} = \frac{u'v-uv'}{v^{2}} [/tex]
My rearrangement looks like this:
[tex] \frac{-3t^{2}-t+1}{(3t^{2}-6t)^{3}} [/tex]
It starts as:
[tex] \frac{\frac{d}{dt}(\frac{3t^{2}-3}{3t^{2}-6t})}{3t^2-6t} [/tex]
and is meant to end up as:
[tex] \frac{-2(t^{2}-t+1)}{3t^{3}(t-2)^{3}} [/tex]
I end up with a mess looking nothing like that and I suspect it's because I've missed some cunning common factor that is easy to spot provided you've already done the problem.
I used the quotient rule for the top part.
[tex] \frac{u}{v} = \frac{u'v-uv'}{v^{2}} [/tex]
My rearrangement looks like this:
[tex] \frac{-3t^{2}-t+1}{(3t^{2}-6t)^{3}} [/tex]