Question

f(x)=-2+ square root x+7 find domain and range

a. The domain is x≥−7

, and the range is f (x) ≥−2 .

b. The domain is x≥7

, and the range is f (x) ≥−2 .
c. The domain is x≥−7 , and the range is all real numbers.
d. The domain is x≥−7 , and the range is f (x) ≥2 .

Answer 1

`f(x)= √(x+7)-2 \\ \\ D: x+7 \geq 0 \\ \\ x \geq -7 \\ \\ f(-7)= √(-7+7) -2 = 0-2=-2 \\ \\ f\in R: f\geq -2`