KiaafaceN7arceliamg
KiaafaceN7arceliamg KiaafaceN7arceliamg
  • 12-06-2016
  • Mathematics
contestada

Let f(x) = x2 − 81. Find f−1(x). (1 point)



±square root of the quantity x plus 81
9 square root of x
1 over quantity x squared minus 81
x squared over 81

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padawan
padawan padawan
  • 12-06-2016
let y = f(x) = x^2 - 81
y + 81 = x^2
x = sqrt(y + 81)
switch y to x, x to y
y = sqrt(x + 81) = f-1(x)
Answer Link
kaka200255
kaka200255 kaka200255
  • 08-12-2019

Answer:

\sqrt{x+81

Step-by-step explanation:

f(x)= x^{2} -81

y=x^{2} -81

x=y^{2}-81

x+81=y^{2}

\sqrt{x+81=y

Answer Link

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