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Polynomial function transformation help

  • Thread starter Nelo
  • Start date
  • #1
215
0

Homework Statement


What is the difference between f(x)= x^3 , and g(x) = x^3 - x

What does that -x do to the function and how do you represent it graphically?

What about f(x) = 3x^3 +x


Homework Equations





The Attempt at a Solution



No idea, wolframalphad the graph but i dont get how to represent it or what it does to the graph.

Anyone help please??
 

Answers and Replies

  • #2
215
0
any1..?
 
  • #3
gb7nash
Homework Helper
805
1

Homework Statement


What is the difference between f(x)= x^3 , and g(x) = x^3 - x
There's a lot of differences. Are you just supposed to list all of the differences that you can find?

What does that -x do to the function and how do you represent it graphically?
This is also not worded very well. What does it do to f(x) how? As far as graphing it goes, just pick a few points and plug them in.
 
  • #4
215
0
Yes.. list the differences, I dont get it.
 
  • #5
215
0
So...

x^3 has points

-2 -8
-1 -1
0 0
1 1
2 8


So doing x^3 + x would be

-2 (-2)^3 + -2 = -10
-1 -2
0 0
1 2
2 10

I graphed it... looks almost exaclty like a linear function, passes thru vertex to.. is taht right then?
 
  • #6
215
0
zzz, anyone?
 

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