Question

() = √2-5

f(1) == ?
all positive real
numbers and
>
all real number greater
than or equal to 5
all real numbers
all real numbers
except 8

Answer 1

Explanation:

1). f(z) =
`√(z-5)`

The given function 'f' is defined for (z - 5) ≥ 0

z ≥ 5

Therefore, domain of the function will be [5, ∞)

Or "All real numbers greater than or equal to 5"

2).
`f(z)=(1)/(z-8)`

Domain: "All real numbers except 8."

Since the given function is not defined for z = 8

3). f(z) =
`√(z)`

The given function is defined for every real numbers greater and equal to zero.

Domain: "All positive real numbers and 0"

4). f(x) = 8x

This function is defined for all real numbers.

"Domain: All real numbers"