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anonymous
 5 years ago
How do you get this?:)
let f(x)=(x+2)/(x+8)
f^1(9)=?
anonymous
 5 years ago
How do you get this?:) let f(x)=(x+2)/(x+8) f^1(9)=?

This Question is Closed

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1you want the inverse of f(x)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[f^(1)(x) = (2 (4 x1))/(x1)\]

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1the inverse is gotten suslly by switching x and y and resolves for y

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0You don't have to find the inverse, Just plug f(x)=9, and then solve for x. That value of x is the inverse at x=9.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0let y = x+2 / x+8 yx + 8y = x+2 x(1y) = 8y2 x = (8y2)/1y which gives u d inverse now switch x and y and put in d value of x to get y

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1x=(y+2)/(y+8) x(y+8)=y+2 xy +8x = y+2 xy  y = 8x +2 y(x1) = 8x+2 y = (8x+2)  (x1)

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1y = (8(9)+2)/(91) y = 74/10 = 7.4

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0welll i did the very same

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1yay!! its verified then ;)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0A simpler method, is to plug f(x)=9 and then solve for x: \[9={x+2 \over x+8} \implies 9x72=x+2 \implies 10x=74 \implies x= 7.4\] So,\[f^{1}(9)=7.4\]

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.1your method is just the same method rehashed lol

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0admit it, mine is better :P
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