Recent content by mblack

First try to remember what the requirements are in order for a function to be considered odd. Second, ask yourself what the sign function does. See if you can put these two pieces of info together, in conjunction with the fact that F(x) is odd, to figure out your question.

Well, you got the right answer but your equations are a little backwards. First of all, since y is a constant value of 1.5, not 5, you can plug it in before you differentiate. Second, remember that the velocity of the plane is in the x direction, not along the hypotenuse of the triangle. 1...

Well, I tried it using my original idea and I couldn't do it that way anyway. However, relatively prime means that if two numbers are separated by an integer (example: 9,10), there is no number that divides both of them evenly except for 1 of course. Thus, any combo of n and n+1 are relatively...

Yeah, that's right. Now do what AEM said.

Well, I don't think you've solved for the right value. The hypotenuse is the distance from the plane to the station, right? That means that it has the value of 2.5 at that time. In other words, the x-component is not 2.5. Also, think about the equation that you're using and how it relates...

Have you drawn a diagram yet? If not, do so and figure out what kind of shape you are dealing with. Then you can see what distance you need to find and derive the equations from there.

I think it might help if you remember that n and n+1 are relatively prime. Think about what you can divide the equation you have in your step by to obtain such a situation.

To see how it is the chain rule, think about what the derivative of ln x is.

I would assume, without further info, that I is the identity matrix. A lot of times when you are proving statements concerning matrices, the identity matrix plays a key role. It's been a while since I've done Linear Algebra so I can't really say anymore about it. Hope this helps!

Homework Statement Draw the diagram P=(X,P) where X={1,2,3,5,6,10,15,30} and x<y in P IFF x divides y. Homework Equations The Attempt at a Solution We just started this discussion in class and I am really not getting the concept of how to draw the corresponding Hasse diagram. I...