Question

Determine whether each function has a maximum or minimum value, and find that

value. Then state the domain and range of the function.
7. f(x) = -32 + 6x - 1
3. f(x)=x2 + 3x - 12
9. f(x) = 3x2 + 8x + 5
10. f(x) = -472 + 10% - 6

Answer 1

7 has no minimum or maximum values. The range and domain is (−∞,∞).

3 has no maximum but has a minimum at (-1.5, -14.25). The doman is (−∞,∞) and the range is (-14.25, ∞).

9 has no maximum but has a minimum at (-4/3, -1/3). The domain is (−∞,∞) but the range is (-1/3, ∞).

I'm not sure if the % in question 10 is supposed to be an x, but I will assume it is. The function has no minimum or maximum, and the range and domain are both (−∞,∞).

Explanation: