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erastova [34]
2 years ago
13

What is the inverse of the function f(x) = 1/9x+2

Mathematics
2 answers:
lubasha [3.4K]2 years ago
7 0

\frak{Hi!}

\orange\hspace{300pt}\above3

                         If we have a function, we can find its inverse if we do the

                         following-:

                        \tiny\bullet replace f(x) with y.

                        \boldsymbol{\sf{y=\displaystyle\frac{1}{9}x+2}}

                        \tiny\bullet switch the places of x and y

                        \boldsymbol{\sf{x=\displaystyle\frac{1}{9}y+2}}}

                         \bullet solve for y

                        \boldsymbol{\sf{x\times9=\frac{1}{9}y\times9+2\times9}}

                         \boldsymbol{\sf{9x=y+18}}

                         \boldsymbol{\sf{-y=-9x+18}}

                          \boldsymbol{\sf{y=9x-18}}}

                        \boldsymbol{\sf{f(x)^{-1}=9x+18}}

\orange\hspace{300pt}\above3

Lady bird [3.3K]2 years ago
3 0

Hello,

f(x) = 1/9x + 2 ⇔ y = 1/9x + 2 ⇔ 1/9x = y - 2 ⇔ x = 9(y - 2)

                                                                            x = 9y - 18

⇒ f⁻¹(x) = 9x - 18

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