Question

Given h of x equals 2 times the square root x minus 5 end root, which of the following statements describes h(x)?

The function h(x) is increasing on the interval (–∞, 5).
The function h(x) is increasing on the interval (5, ∞).
The function h(x) is decreasing on the interval (–5, ∞).
The function h(x) is decreasing on the interval (–∞, –5).

Answer 1

B

Explanation:

x -5 ≥ 0

x ≥ 5

the function exists only in the interval [5, +oo) and it keeps growing