Question

The inverse of f(x) = x2 – 3 is

f-() = x2 +3
:: - (2) = V2 + 3
:: f-(x) = V2 - 3
:: f-1 (2) = 1 - 3

Answer 1

Explanation:

i guess maths is the hardest subject

Answer 2

• f ⁻¹(x) =
  `√(x + 3)`

Explanation:

Find the inverse of f(x) = x² - 3

Substitute x with y and f(x) with x and solve for y:

• x = y² - 3
• y² = x + 3
• 
  `√(y^2)` =
  `√(x + 3)`
• y =
  `√(x + 3)`

Replace y with f⁻¹(x):

• f ⁻¹(x) =
  `√(x + 3)`