Question

Which of the following is true about the function?

1/Square root of x+4

a)domain=[-4, infinity) range=(-infinity, infinity)

b) Domain= (-4, infinity) range= (-infinity, 0) U (0, infinity)

c) domain= (-infinity, 0) range= (0, infinity)

d) domain= (-4, infinity) range= (0, infinity)

Answer 1

Domain - values that x can be. Range - values that y can be.

Answer 2

Remember that the denominator cannot be zero.
AND
Remember that you can't take the square root of a negative

Answer 3

so solve the following:
x+4>0

Answer 4

That will give you your domain.