Continuous function solutions

In summary, a continuous function cannot have two solutions for the equation f(x) = c for every c, and a good approach to prove this is through contradiction and considering the function's behavior on an interval between two points that map to the same value.
  • #1
za10
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Homework Statement



Show that a continuous function such that for all c in the reals, the equation f(x) = c cannot have two solutions

Homework Equations





The Attempt at a Solution



I was thinking along the lines of a contradiction or somehow using intermediate value theorem but it seems like it is so easy it is hard.
 
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  • #2
What are you actually trying to prove here? Your sentence doesn't parse properly
 
  • #3
show that a continuous function cannot have two solutions for the equation f(x) = c for every c.
 
  • #4
I have f(x) = c... am I solving for x given c? What you're trying to say is that f can't be two to one (i.e. for every point p in the image, there are two points in the preimage of p).

Contradiction is a good place to start. There have to be two points that f maps to zero, consider f on the interval between them
 

1. What is a continuous function?

A continuous function is a mathematical function that has no abrupt changes or discontinuities in its graph. This means that the function can be drawn without lifting the pen from the paper.

2. How do you determine if a function is continuous?

A function is continuous if it satisfies the three conditions of continuity: the function is defined at the point, the limit of the function exists at that point, and the limit is equal to the value of the function at that point.

3. Can a continuous function have a hole or jump in its graph?

No, a continuous function cannot have a hole or jump in its graph. This would violate the condition of continuity that the limit of the function must exist at the point.

4. What is the importance of continuous functions in mathematics and science?

Continuous functions are essential in mathematics and science because they allow us to model and analyze real-world phenomena. They are used in areas such as physics, engineering, economics, and statistics to make predictions and solve problems.

5. How are continuous functions different from non-continuous functions?

The main difference between continuous and non-continuous functions is that the graph of a continuous function is a connected line or curve, while the graph of a non-continuous function has breaks or gaps in it. Additionally, a continuous function satisfies the three conditions of continuity, while a non-continuous function does not.

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