Linear Algebra Help I need help figuring out these 2 problems. The answers are underneath the problem 1. T : R^2 --> R^2 , Linear Trans. T(x,y) = (x+2y, y-x) Find Ker(T). Ans: {0,0} 2. T(vector x) = Ax Linear Trans. A=[4 1] ....[0 0] (supposed to be a 3x2 matrix) ....[2 -3] Find (a) Ker(T) (b) nullity(T) (c) range(T) (d) rank(T) Ans: (a) {(0,0)} (b) 0 (c) {(t,0,s) | t,s real} (d) 2 I'm not exactly sure how to do it. The way he does it is a bit confusing and I dont understand it. EDIT: Not sure why it is showing both as number 1. The 2nd number 1 should be number 2 but its not changing so yea.
Differential Equations help Solve the homogenous differential equations analytically 1. y'=2 (y/x+y)^2 2. 2x^5 dy + ( (x^2) y+1) y dx =0 The answer I got for 1 was y=-(x^2)(e^c) but idk if that's right I have no idea how to do 2 though.
Physics Help Does anyone know how to do problem number 1? I'm not sure if I'm doing it right. Ignore the .555N. Idk what that is since i took the picture off of someone else's since they ran out of copies. Unless the that is the answer but I got something completely different. Thanks. Edit:
Physics Help I need help with this question. Also does anyone know how to draw the diagram too? I'm not sure which way p and q go. I used the formual 1/p + 1/q = 1/f but i'm getting confused with the negative and positives and also the way the mirrors reflect. If anyone can help me I would really appreciate it.
Chemistry Help I'm having trouble figuring out the net ionic equations 3H2SO4 + 2K3PO4 = 2H3PO4 + 3K2SO4 Is the H3PO4 soluble? According to the solubility rules, all phosphates are insoluble except the combined with alkali metals. Hydrogen isn't an alkali metal though. But H2SO4 is an acid so shouldn't it be aqueous?
Partial Derivative Question ;showsteps=1 Why wouldn't we take the derivative of the bottom x^2 from the (y^2/x^2) I thought we were supposed to take the derivative of all of the x in the equation Edit: Guess the link doesn't work so you might have to copy paste it
Physics/Math Help This might be kind of a dumb question. Maybe im just doing something wrong. I'm trying to find time from the equation x(t)=Acos(wt+phi) where: A=amplitude, w=omega, t=time, phi=phase angle(horizontal so phase angle is 0) How would you solve for t? I keep getting the wrong answer. When I plug everything in I get 0.01=0.04cos(26.46t + 0)
Maple Chat Anyone else notice that Eileen from Maple Chat calls herself Irene?
Do you pee in the shower? Be honest please.
Num Lock Keys? How do you change the num lock keys on maplestory? The 0 on the num lock key used to also be pick up button. Now when I push it, it opens up my equipment inventory. Does anyone know how to change it?
It Has Begun Well now that the maintenance has started, what are you guys gonna do? Edit: Also the site says it will last 5 hours till 4 am PST What time do you you predict it will actually be up?
What happened to Numbfeet? Not sure if you guys know this basiler but he used to make the best comics ever. What happened to him?
Calculus Help? Hi, I kind of needed help with these Calculus problems. Not really sure how to even do them so if you can help I would appreciate that. 1. Find the centroid of the region bounded by y=sinx and y=0 between x=0 and x=4 2. Find the arc length of the graph y=sqrt(x) between x=0 and x=4 3. Not really sure how to write out this integral problem but ill try Integral of ln5 to ln7 of e^(2x) / (sqrt( (e^2x) - (6e^x) + 5)) dx 4. How much work is required to pump the water out of the top of a half-full 10 foot long horizontal cylindrical tank that has radius 3ft? The weight density of the water is 62.4 lb/ft^3 For number 1 i found out M and x bar but i can't figure out how to do y bar. the rest I have no idea how to do.
Is Bera Down? I know the maintenance is scheduled for tomorrow at 7-9 am for Bera only but for some reason everytime i try to open it, it says there is server check or something. Is it just me or is it happening to everyone else in Bera?
Help with Claim Of Fact Essay I need to write a Claim of Fact Essay. How do we write it? Is it just like a regular 5 paragraph essay or something? And is there any good topics I should do? Should I just pick a topic that I find interesting? Thank you.
Where Did Inkwell go? Is the even for him over? I still have the chocolate box and he isn't in his normal spot anymore...