ayeitscharis ayeitscharis

01-09-2016
Mathematics

contestada

Let f(x)=x^2 -81. Find f^1(x)

Respuesta :

01-09-2016

Hello,

I suppose you mean -1! else f(x)=f^1(x)

y=x²-81
-> x=y²-81 (exchahge x and y)
->y²=x+81 (solve for y)
[tex]y= \sqrt{x+81} \ or \ y=- \sqrt{x+81} [/tex] It is because (f^-1)(x) is not a function!

with x>=-81

Answer Link

Otras preguntas

Choose three of the following questions to ask Moses, Jesus, and Muhammad: •Why is the Holy Land an important site for your faith? •What is your perspective or

pregnant and breast-feeding women should eat at least 12 ounces of fish and seafood per week to ensure their babies’ optimal brain development, according to a c

what was a military state?

A loan company charged 44 percent interest on every dollar borrowed. If a person borrowed 147 dollars, how much would they end up paying in total?

Why did most Native Americans tend to side with the English? A) Americans settlers were taking lands away from Native Americans. B) The English promised to r

How is DNA related to chromosomes????????????:/

How did Franklin Roosevelt's presidency transform the government?

Why shouldn't students eat the lunch and why shouldn't they eat healthy

Helppp me yfovkhovhivy

Solve 4(x - 3) - 2(x - 1) > 0. {x | x < -5} {x | x > -5} {x | x > 5} {x | x < 5}