VCE Maths questions help (5 Viewers)

[boredsatan]

So R- means <0?

Bump!

 

[boredsatan]

What's the difference between open and closed brackets?

 

[InteGrand]

What's the difference between open and closed brackets?

 

[boredsatan]

How about when stating the domain and range. How do you find out if it's open or closed?

 

[boredsatan]

How about when stating the domain and range. How do you find out if it's open or closed?

bump!
How do you know weather to state the domain with open or close brackets?

 

[InteGrand]

bump!
How do you know weather to state the domain with open or close brackets?

Depends on whether the domain includes the endpoint or not.

 

[boredsatan]

Depends on whether the domain includes the endpoint or not.

Some questions ask you to state the domain and range of a graph. How do you know weather to state it as open or closed?

 

[InteGrand]

Some questions ask you to state the domain and range of a graph. How do you know weather to state it as open or closed?

If they give you the graph, you can look at it to see if an endpoint is included or not.

 

[boredsatan]

If they give you the graph, you can look at it to see if an endpoint is included or not.

So if it was a parabola that had arrows going in each direction would it be infinity and open bracket?

 

[InteGrand]

So if it was a parabola that had arrows going in each direction would it be infinity and open bracket?

 

[boredsatan]

Is this for the domain or the range?

 

[InteGrand]

Is this for the domain or the range?

Domain

 

[boredsatan]

Domain

so the range would be (lowest y value, infinity)?

 

[boredsatan]

What is the domain and range of y = 3/(x+2)^2 + 2?

 

[boredsatan]

What is the domain and range of y = 3/(x+2)^2 + 2?

Anyone?

 

[Drongoski]

Assuming the natural domain; i.e. largest set of values of x that is allowed. For this question, where presumably we are dealing with a real function, it is all real values except x = -2; when x = -2, you will have a division by zero - which is a Cardinal sin in maths. The corresponding range is all y > 2; i.e. all real numbers greater than 2.

 

[boredsatan]

Assuming the natural domain; i.e. largest set of values of x that is allowed. For this question, where presumably we are dealing with a real function, it is all real values except x = -2; when x = -2, you will have a division by zero - which is a Cardinal sin in maths. The corresponding range is all y > 2; i.e. all real numbers greater than 2.

is there any other domain possible?

 

[InteGrand]

is there any other domain possible?

Yes. What Drongoski gave is the natural domain (assuming we are dealing with functions of a real variable). You can read up about this here: https://en.wikipedia.org/wiki/Domain_of_a_function#Natural_domain .

 

[boredsatan]

How should I prepare for my maths application task, which is in a week.?

 

[boredsatan]

How should I prepare for my maths application task, which is in a week.?

any thoughts?