Question

What is the domain and range for the following function and its inverse?

f(x) = x2 – 2

Answer 1

f(x) = x^2-2

Domain is all real numbers
Range: y = all real numbers, y is greater than or equal to -2

Answer 2

sinc there are no restrictions for the values you can substitute as 'x' ,
the domain is R - all real

now for range , u need to see what possible outcomes u get for substituting different values

Answer 3

if u put 0 , then y = -2

if u put any other number , the square makes ir positive and it will always be higher than -2

so range is [-2,infinity]