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

What kind of world will we be living in after a century? (4-5 SENTENCE ANSWERS) WILL GIVE BRAINLIEST!! PLS HELP!!!

A. discrete B. continuous C. linear D. nonlinear E. increasing F. decreasing G. both increasing and decreasing H. neither increasing nor decreas

pls i need help i dont wanna fail

please help thanks❗

simplify (2x+5y) (2x+3y)

PLLLZZZZ!!! HELP!!! WILL GIVE BRAINLIEST!!!! Given a polynomial f(x), if (x − 6) is a factor, what else must be true? A. f(0) = −6 B. f(0) = 6 C. f(−6) = 0

Olive Oil costs $8.70 per liter. A restaurant owner buys 5.6 liter of olive oil. How much does the owner pay?

Kenneth John makes a deposit at an ATM and receives $75.00 in cash and a receipt for the $872.25 total deposit. He remembers that the checks deposited totaled t

The force F needed to stop a car varies directly as its weight W and the square root of velocity V are inversely as the distance d travelled. When F=36 Newtons,

Devoir maths Ecris les multiple de 14 compris enter 1et100