SOLUTION: For each pair of functions, find fog and gof, if they exist f={(-1,2),(5,6)(0,9)} g={(6,0),(2,-1),(9,5)}

Algebra.Com
Question 1138851: For each pair of functions, find fog and gof, if they exist
f={(-1,2),(5,6)(0,9)}
g={(6,0),(2,-1),(9,5)}

Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!
solve a system of three equations derived from the original three coordinate pairs
f={(-1,2),(5,6)(0,9)}

(,)

..........eq.1
(,)

..........eq.2
(,)


go to ..........eq.1, substitute
..........solve for
..........eq.2 , substitute and
.......solve for





go to ......eq.1a, substitute




=>


g={(6,0),(2,-1),(9,5)}

(,)

..........eq.1
(,)

..........eq.2
(,)

..........eq.3
go to
..........eq.1
..........eq.2
------------------------------------------subtract

.........solve for

............eq.1a
go to
..........eq.3
..........eq.1
------------------------------------------subtract

.......solve for
..............eq.2a
from eq.1a and eq.2awe have
........solve for



go to ............eq.1a, substitute



go to ..........eq.2, substitute and







so, your functions are:


find o=



and o=





RELATED QUESTIONS

``page 388for each pair funtion,find fog and gof , if they are exit f =... (answered by )
Help please! f(x)=3x^2-2x and g(X)=x-6 find each value for the below: 1: (f/g)(-1) (answered by Jk22)
page 388 for each pair funtion,find fog and gof , if they are exit a) f =... (answered by Big Poop)
page 389 for each pair funtion,find fog and gof , if they are exit 24) f =... (answered by stanbon)
page 389 for each pair funtion,find fog and gof , if they are exit 26) f =... (answered by )
3.22 For f(x)=x+5 and g(x)=4x+4, find the following functions: a. (fog)(x)= b.... (answered by dkppathak)
0. given f(x) =8x -2 and g(x) = 2x -3 find f-g 1. given f(x) =5x + 4 and g (x)... (answered by solver91311,Alan3354)
Let ƒ(x) = 3x2 – 2x and g(x) = x – 6. Find each value. THANKS FOR YOUR HELP.. I... (answered by stanbon)
for each set of ordered pairs find f of g and g of f if they exist? f=(-9,-1) -1,0 3,4... (answered by MRperkins)