Question

If f(x)= 1 for [-7,-3), 3 for [-3,1), and 5 for [1,5), how do you find f(3)?

Answer 1

`f(3) = 5`

Explanation:

The input to `f` is 3. Find the range in which 3 falls. It isn't between -7 and -3, nor is it between -3 and 1, but it is between 1 and 5. `f` is defined as 5 for values between 1 and 5, so the answer is 5.

Answer 2

f(3)=5

Explanation:

First ascertain, in which of the three given intervals, 3 lies. It obviously lies in the interval [1,5). In this interval, for all x, f(x)=5. Hence f(3) would be 5.