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

lollololrgmr4ijngwierjnejgnhwhjvb hreeqhuvcbwfhbqeirfs

Plants need what that animals exhale

Find the outlier of the data set? 40, 62, 47, 68, 12, 78, 49, 65, 49, 52, 63

Could you guys help me plz.

Using natural resources is considered a sustainable practice because most natural resources are in limitless supply and cannot be degraded or depleted.True or F

What allowed currency in the ancient world to work as a tool for the exchange of goods?

the term " the new south " was coined by this journalist , who was on a mission to explain that the south plantation system was a thing of the past

1. An athletics timekeeper records a sprinter's time as 10.0 +0.1 seconds. A) What is the shortest and longest possible time? B) What is the percentage uncertai

Use the verbs in the list to complete the sentences about what different activities take place during school. Some verbs may not be used. Modelo: Yo estudio muc

The quantity demanded for cosmetic surgery increased by 12 percent following a period of strong economic growth that raised consumer income by 4 percent. What t