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

If the size, mass, and arrangement of atoms affect the density of a substance. How might these factors work together to cause a substance to have a low density?

A local pizza shop has a membership program for frequent buyers the membership cost $25 per month the members get a discount price of 150 per pizza slice Aaliya

What are some political thing in Europe

"Joseph suffers from a loss of sensation and movement due to injury to his nervous system. He is experiencing:"

Brett has consumed 1,400 calories so far today. He has also burned off 400 calories at the gym. He would like to keep his daily calorie total to 2,000 calories

What is the best study group?

What is the relationship between the plant and animal cell structures? Can somebody please help me.

please help asap !!!! identify the values that should be tested to see if a change occurs x - values y - values z - values h - values

What effect does the author achieve by having Higgins and Pickering speaking together on pages 3-4? indecision on the part of the reader as to which character i

Juan pays $15 per hour to rent a paddle boat. He can rent a wetsuit for $5 a day. What amount will he pay if he rents the paddle boat for 6 hours