Respuesta :
f(x) = x² - 25
y = x² - 25
x = y² - 25
+ 25 + 25
x + 25 = y²
√x + 25 = √y²
±√x + 25 = y
±√x + 25 = f⁻¹(x)
y = x² - 25
x = y² - 25
+ 25 + 25
x + 25 = y²
√x + 25 = √y²
±√x + 25 = y
±√x + 25 = f⁻¹(x)
[tex]f(x) = x^{2} - 25[/tex]
Let f(x) = y
thus y = [tex] x^{2} - 25 [/tex]
switch the position of y and x in the equation
[tex]x = y ^{2} - 25[/tex]
then solve for y in this case
[tex]x + 25 = y^{2} [/tex]
∴ y=[tex] \sqrt{x + 25} [/tex]
Thus, [tex] f^{-1} (x) = \sqrt{x + 25} [/tex]
Let f(x) = y
thus y = [tex] x^{2} - 25 [/tex]
switch the position of y and x in the equation
[tex]x = y ^{2} - 25[/tex]
then solve for y in this case
[tex]x + 25 = y^{2} [/tex]
∴ y=[tex] \sqrt{x + 25} [/tex]
Thus, [tex] f^{-1} (x) = \sqrt{x + 25} [/tex]