• ### How do I find and sketch the domain of the function f(x,y) = √(1+(1/(x-y)))?

How do I find and sketch the domain of the function: f(x,y) = √(1+(1/(x-y))) I think the domain is x>y but I'm not sure. Also, I can't figure out how to sketch the graph of the domain in 3-space?
How do I find and sketch the domain of the function: f(x,y) = √(1+(1/(x-y))) I think the domain is x>y but I'm not sure. Also, I can't figure out how to sketch the graph of the domain in 3-space?
Mathematics · 10 years ago
• ### Determine whether the series converges?

∞ Σ (sqrt(n^2+4)/(n^3+n)) n=1 How do I determine if the series is convergent? I have tried numerous convergent tests but I'm not sure which test would be the right one to use....Any help would be much appreciated!
∞ Σ (sqrt(n^2+4)/(n^3+n)) n=1 How do I determine if the series is convergent? I have tried numerous convergent tests but I'm not sure which test would be the right one to use....Any help would be much appreciated!
2 answers · Mathematics · 10 years ago
• ### Integrate xcos(2x) dx?

I know I need to integrate by parts but I can't figure out how to do it. Any help on the problem is much appreciated!
I know I need to integrate by parts but I can't figure out how to do it. Any help on the problem is much appreciated!
4 answers · Mathematics · 10 years ago
• ### Finding the derivative of f(x) = x^(1/2)/(x^2+1)?

I can get to about the 2nd step of the problem but can't figure out how to simplify it...If someone can help me figure out how to solve it that would be awesome! thanks! So far I have simplified it down too: [(x^2+1)/(2(2^.5)) - ((x^.5)(2x))]/[(x^2+1)^2) I'm not sure how to simplify this....
I can get to about the 2nd step of the problem but can't figure out how to simplify it...If someone can help me figure out how to solve it that would be awesome! thanks! So far I have simplified it down too: [(x^2+1)/(2(2^.5)) - ((x^.5)(2x))]/[(x^2+1)^2) I'm not sure how to simplify this....
• ### Visual basic questions?

I'm studying for a test I have and on the review there are a few questions I need help with: 1) What is the return type of a function that overloads the greater-than ( > )operator? 2) Describe one method (function/sub) that can, and one that cannot be overloaded. 3) What is the value of a class hierarchy? The help will be... show more
I'm studying for a test I have and on the review there are a few questions I need help with: 1) What is the return type of a function that overloads the greater-than ( > )operator? 2) Describe one method (function/sub) that can, and one that cannot be overloaded. 3) What is the value of a class hierarchy? The help will be greatly appreciated! Thanks!
• ### What does upperbound do in visual basic?

Trying to study for an exam I have tomorrow and one of the questions might be "what does get upperbound do?"
Trying to study for an exam I have tomorrow and one of the questions might be "what does get upperbound do?"
• ### What does the &= symbol stand for/do in visual basic?

Here is code I am working on right now but even though I am using the &= symbol I am not really sure what it is doing to my project. Can anybody help me understand what it is doing? Public Class Form1 Dim i As Integer Dim j As Integer Dim k As Integer Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As... show more
Here is code I am working on right now but even though I am using the &= symbol I am not really sure what it is doing to my project. Can anybody help me understand what it is doing? Public Class Form1 Dim i As Integer Dim j As Integer Dim k As Integer Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click Dim row, entry As String ListBox1.Items.Clear() For i = 1 To 2 row = "" For j = 1 To 8 entry = "X" row &= entry & " " Next ListBox1.Items.Add(row) Next End Sub End Class
• ### Calculus help!?

The question is: y=x+(1/x) Find f ' (a) and equation of the tangent line. Start by using the formula f ' (a) = lim (f(a+h) - f(a)) / h h->0 This is a question on my homework and I can't figure out how to break it down. I know how to plug it into the equation but I'm having... show more
The question is: y=x+(1/x) Find f ' (a) and equation of the tangent line. Start by using the formula f ' (a) = lim (f(a+h) - f(a)) / h h->0 This is a question on my homework and I can't figure out how to break it down. I know how to plug it into the equation but I'm having trouble simplifying it. If anyone can help I would greatly appreciate it! Thanks!
• ### Calculus limits and derivatives problem!?

The question asks "find an equation of the tangent line to the curve at the given point. y= square root of x, (1,1) use formula: limit f(a+h) - f(a) / h h to 0 I've figured out where to start but I have no idea how to simplify it down. Please help!
The question asks "find an equation of the tangent line to the curve at the given point. y= square root of x, (1,1) use formula: limit f(a+h) - f(a) / h h to 0 I've figured out where to start but I have no idea how to simplify it down. Please help!
• ### Help with finding the limit of 2 square roots!?

I've been working on this calculous problem forever and I can't figure it out! Can someone please show me how? Thanks its greatly appreciated! limit x to (infinity) = (√x^2+ax) - √x^2+bx))
I've been working on this calculous problem forever and I can't figure it out! Can someone please show me how? Thanks its greatly appreciated! limit x to (infinity) = (√x^2+ax) - √x^2+bx))