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

Can someone explain this? :)

How does the imagery in this excerpt affect the meaning? A.)It makes the French countryside seem like a magical, unspoiled place. B.) It proves that Twain is a

What is the structure of a fluorine atom?

help find x for a,b,c and d i will rate thank u

PLZ HELP ME ASAP Which is outlined in Article V of the Constitution?

Dialects differ from one another in what aspects? pronunciation idiom language vocabulary

On the map of Oceania, number 1 is referring to which of the following countries? A. Papua New Guinea B. Australia C. Fiji D. Solomon Islands

PLEASE HELP!!!! i really dont understand hahaha

Chris owes $17,000 to a bank. The debt grows with 8% annual interest that compounds every year. How much will Chris owe in one year? A. 18,014 B. 18,242 C. 18,3

Which of the following statements about the Robinson projection is correct? It is more useful for long-distance navigation than the Mercator projection. B It is