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# C4 Differential watch

1. I'm stuck at question 3

Here's what I done so far, where have I gone wrong? I have no idea how to get t

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2. (Original post by isteven)
I'm stuck at question 3

Here's what I done so far, where have I gone wrong? I have no idea how to get t

You should have 2(t+2)=0

Just the final line is wrong
3. (Original post by isteven)
I'm stuck at question 3

Here's what I done so far, where have I gone wrong? I have no idea how to get t

anything times 0 is always 0
4. Everything so far is correct right? So in the end should I get 2(t + 2) = 0?
5. (Original post by isteven)
Huh what happened to the 5t^4?
For a fraction to be zero, the numerator must be zero

When you multiplied (I guess that is what you did) 5t^4 x 0 would give 0

Either way ... No 5t^4
6. (Original post by isteven)
Everything so far is correct right? So in the end should I get 2(t + 2) = 0?
That is what I said

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Updated: January 27, 2015
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