Question

Q: find the domain and range of the function f(x) = x^2 - 1​

Answer 1

Step-by-step explanation:

Domain = R

For range,

let y = x^2 - 1

x^2 = y + 1

x = (+/-)√(y + 1)

y should be greater than or equal to -1

otherwise, √(y + 1) will be imaginary.

Hence,

$Range = [ -1, \infty)$