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# c3 functions watch

1. will post in a min

2. need help in part b
ff(0)

f(0)=5
f(5)=?

ff(x) has two equations if I put 5 in first equation I get 0 why this will be wrong?
3. Because the first equation only applies when x is less than or equal to 4. However 5 >4 therefore you need to use the second equation.
Because the first equation only applies when x is less than or equal to 4. However 5 >4 therefore you need to use the second equation.
thanks
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5. (Original post by Qer)
thanks
Turning point is where the gradient is 0, so use part (a) to find where that is.

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