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

Which of these bases form a true complementary pair? adenine and guanine thymine and uracil cytosine and guanine cytosine and thymine

Why does music written in a minor key sound "sad" or "downbeat," while music in a major key sounds "happy" or "upbeat"?

What is 1000/41? please help me

What is the ratio of the outputs for x = 6 and x = 2? A)22 B)23 C)24 D)25 x f(x) 1 18 2 14 3 12 4 1 5 2 6 4 7 8 8 16 <------- The ratio tab

what structure in the human body provide a function similar to that of sclerenchyma cell in plant? explain.

Please someone help me

PLEASE HELP!!! I don't get this and I have to turn the assignment in by the tomorrow. Does the speaker of “Elegy Written in a Country Churchyard” view the humb

Which of these is the MOST LIKELY contributor to "acid rain"? A) cars that run on gasoline B) ranches that raise cattle C) erosion from deforestation D) pow

1. List and explain the difference between the minimum voltage and maximum voltage achieve in a nerve impulse

"Scientists have successfully cloned animals, such as Dolly the sheep. Some people hope that cloning techniques will be used to clone humans someday, while othe