Pls help me in solving this question. Thanks

[newuser]

Express the inequalities in normal language and find A={x€R/f(x)>3} and B={x€R/f(x)<0} through graph.

 

[HallsofIvy]

Are you saying that you have no idea what these mean? The inequalities just say "f(x) (the value of the function) is larger than 3" and "f(x) (the value of the function) is less than 0".

f(x) is the y value. To find what values of x make those true, I recommend drawing (or imagining) a horizontal line at y= 3. Look at the part of the graph, if any, that is above that line. What are the corresponding x values?

Then draw a horizontal line at y= 0 (that is, by definition, the x-axis). What parts of the graph are below that line? What are the corresponding x values?

 

[mmm4444bot]

Hi newuser:

Until you ask some questions of your own (or explain why you're stuck), tutors cannot determine how to help you.

Please read the post titled "Read Before Posting" for information on how to ask for help.

Cheers ~ Mark :cool:

 

[newuser]

Are you saying that you have no idea what these mean? The inequalities just say "f(x) (the value of the function) is larger than 3" and "f(x) (the value of the function) is less than 0".

f(x) is the y value. To find what values of x make those true, I recommend drawing (or imagining) a horizontal line at y= 3. Look at the part of the graph, if any, that is above that line. What are the corresponding x values?

Then draw a horizontal line at y= 0 (that is, by definition, the x-axis). What parts of the graph are below that line? What are the corresponding x values?

I am confuse. I think the answer will be null i.e. we don´t have any value.correct?

 

[HallsofIvy]

I am confuse. I think the answer will be null i.e. we don´t have any value.correct?

You gave two questions. Which are you referring to? One of the problems has the null set as answer, the other does not.