Are g(x) and f(g(x)) both onto?

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In summary, when approaching solving a function proof problem, it is important to carefully read and understand the given problem, identify what needs to be proven and what information is given, and use algebraic or logical reasoning to manipulate the information to come to a conclusion. Some common strategies for solving function proof problems include algebraic manipulations, working backwards, substitution or elimination methods, and using diagrams or graphs. To ensure the correctness of your solution, carefully check your work and seek feedback from others. Common mistakes to avoid include incorrect assumptions, algebraic manipulations, and not showing all steps and reasoning. Regular practice and seeking assistance can improve skills in solving function proof problems.
  • #1
zaczhou
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if f(y) is one to one, and f(g(x)) is one to one, is g(x) one to one?
if g(x) is one to one, and f(g(x)) is one to one, is f(y) one to one?
if g(x) and f(g(x)) are onto, is f(y) is also onto?
if f(y) and f(g(x)) are onto, is g(x) is also onto?
 
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  • #2
Well, what do you think? You must show your work before we can help you. Do you know the definitions of one-to-one, and onto functions?
 

1. How do I approach solving a function proof problem?

When solving a function proof problem, the first step is to carefully read and understand the given problem. Then, identify what needs to be proven and what information you have been given. Next, try to manipulate the given information using algebraic or logical reasoning to come to the desired conclusion. It is important to show all of your steps and provide a clear explanation for why each step is valid.

2. What are some common strategies for solving function proof problems?

Some common strategies for solving function proof problems include using algebraic manipulations, working backwards from the desired conclusion, using substitution or elimination methods, and drawing diagrams or graphs to aid in understanding the problem. It is also helpful to look for patterns and relationships between the given information and the desired conclusion.

3. How do I know if my solution to a function proof problem is correct?

To determine if your solution to a function proof problem is correct, you should carefully check your work to make sure that each step is valid and that your final conclusion follows logically from the given information. It can also be helpful to check your solution using numerical examples or by asking a classmate or teacher for feedback.

4. Are there any common mistakes to avoid when solving function proof problems?

Yes, there are a few common mistakes to avoid when solving function proof problems. These include making incorrect assumptions, using incorrect algebraic manipulations, and not showing all of your steps and reasoning. It is also important to carefully check your work for errors, as even small mistakes can lead to an incorrect solution.

5. How can I improve my skills in solving function proof problems?

The best way to improve your skills in solving function proof problems is to practice regularly. Start with simpler problems and gradually work your way up to more complex ones. It can also be helpful to work with a study group or seek assistance from a teacher or tutor if you are struggling with a particular concept or strategy. Additionally, reviewing and understanding common patterns and methods used in function proof problems can also help improve your skills.

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