Answer:
![f^{-1}(6) = 50](https://tex.z-dn.net/?f=f%5E%7B-1%7D%286%29%20%3D%2050)
Step-by-step explanation:
Given
![f(x) = \sqrt{2x} - 4](https://tex.z-dn.net/?f=f%28x%29%20%3D%20%5Csqrt%7B2x%7D%20-%204)
Required
Find ![f^{-1}(6)](https://tex.z-dn.net/?f=f%5E%7B-1%7D%286%29)
First, we calculate the inverse function
![f(x) = \sqrt{2x} - 4](https://tex.z-dn.net/?f=f%28x%29%20%3D%20%5Csqrt%7B2x%7D%20-%204)
Express f(x) as y
![y = \sqrt{2x} - 4](https://tex.z-dn.net/?f=y%20%3D%20%5Csqrt%7B2x%7D%20-%204)
Swap the positions of x and y
![x = \sqrt{2y} - 4](https://tex.z-dn.net/?f=x%20%3D%20%5Csqrt%7B2y%7D%20-%204)
Solve for y: Add 4 to both sides
![4 + x = \sqrt{2y} - 4+4](https://tex.z-dn.net/?f=4%20%2B%20x%20%3D%20%5Csqrt%7B2y%7D%20-%204%2B4)
![4 + x = \sqrt{2y}](https://tex.z-dn.net/?f=4%20%2B%20x%20%3D%20%5Csqrt%7B2y%7D)
Square both sides
![(4 + x)^2 = 2y](https://tex.z-dn.net/?f=%284%20%2B%20x%29%5E2%20%3D%202y)
Divide both sides by 2
![y = \frac{(4 + x)^2}{2}](https://tex.z-dn.net/?f=y%20%3D%20%5Cfrac%7B%284%20%2B%20x%29%5E2%7D%7B2%7D)
Express y as an inverse function
![f^{-1}(x) = \frac{(4 + x)^2}{2}](https://tex.z-dn.net/?f=f%5E%7B-1%7D%28x%29%20%3D%20%5Cfrac%7B%284%20%2B%20x%29%5E2%7D%7B2%7D)
Next, solve for: ![f^{-1}(6)](https://tex.z-dn.net/?f=f%5E%7B-1%7D%286%29)
Substitute 6 for x
![f^{-1}(6) = \frac{(4 + 6)^2}{2}](https://tex.z-dn.net/?f=f%5E%7B-1%7D%286%29%20%3D%20%5Cfrac%7B%284%20%2B%206%29%5E2%7D%7B2%7D)
![f^{-1}(6) = \frac{(10)^2}{2}](https://tex.z-dn.net/?f=f%5E%7B-1%7D%286%29%20%3D%20%5Cfrac%7B%2810%29%5E2%7D%7B2%7D)
![f^{-1}(6) = \frac{100}{2}](https://tex.z-dn.net/?f=f%5E%7B-1%7D%286%29%20%3D%20%5Cfrac%7B100%7D%7B2%7D)
![f^{-1}(6) = 50](https://tex.z-dn.net/?f=f%5E%7B-1%7D%286%29%20%3D%2050)
Answer:
A(1,1)
Step-by-step explanation:
the system is :
2x-y=1
x+2y=3
so :
y = 2x-1 .....the line color : red
y= (-1/2)x+3/2......the line color : blue
the pair solution is the intersection point for this line : A(1 ; 1)
Answer:
x=0, x= - 3, x=9
Step-by-step explanation:
f(x)=7/2x(x+3)(x-9)
f(x) doesn't exist for x=0,-3,9
as
![\lim_{x \to \ 0,-3,9} f(x) = inf](https://tex.z-dn.net/?f=%5Clim_%7Bx%20%5Cto%20%5C%200%2C-3%2C9%7D%20f%28x%29%20%20%3D%20inf)
vertical asymptote:
x=0, x= - 3, x=9
Answer:
12.1
Step-by-step explanation:
7/9 divided by 5/6 = 14/15
in decimal for it would be 0.93