Recent content by nikk834

ok when i solve x, y and lagrange they want me to find this Use the second order condition to determine if the optimal point is maximum or minimum. that means i take the second derivative and how do i determine if it is a max or min?

Homework Statement Use probability trees to determine the probability of obtaining,in a deck of cards: two red cards (A-10 hearts or diamonds) and two picture cards (any suit) in any order? Homework Equations The Attempt at a Solution P(1st red card)= 20/52 P (2nd red...

dL/dx = 12.25x-42+5y-6L = 0 dL/dy= 5x-28 +2y-5L=0 dL/dL= -(6x+5y-37)=0 So how do you solve for x, y and L

dl/dy that is

I see what you mean now. So there is a 5 in front of the y for the constraint so that means that dy/dl would have to be : 5x-28 +2y-5L=0

i just do not know how to solve for x, y and l

I am going by an example that the teacher gave us and he said that the dl/dl would just go as -(6x+5y-37)

so your saying you would put the dl/dl as -L(6X+5Y-37)=0

Ya so the derivative are: dL/dx= 12.25x-42+5y-L dL/dy= 5x-28+2y-L dL/dL=-(6x+5y-37) You then set them to 0 so they are dL/dx= 12.25x-42+5y-L=0 dL/dy= 5x-28+2y-L=0 dL/dL=-(6x+5y-37)=0 Then, could you times the 2nd equation there which is dL/dy by 2 to give you common y terms of 10y?

Sure. The function would be:f (x,y) = 3.5x^2+y^2-42x-28y+5xy+190 - backward L(6x+5y-37)

I typed out the word lagrange because i do not have the backward L function on my keyboard. It means -backward l . I know how to get the derivative now . I just don't know how to solve for x, y and lagrange(backward l)

dL/dx= 12.25x-42+5y-lagrange dL/dy= 5x-28+2y-lagrange dL/dL=-(6x+5y-37) So 12.25x-42+5y-lagrange=0 5x-28+2y-lagrange=0 -(6x+5y-37)=0 What do you do next? Multiple them by a common factor.what do you do with lagrange?

I'm not sure. I am having difficulty solving this equation.

df/dx=12.25x -42 +5y df/dy=2y-28+5x df/dlagrange = -(6x+5y-37) You make them all equal to 0 so df/dx=12.25x+5y-42=0 df/dy=5x+2y-28=0 df/dlangrange=6x+5y-37=0 Is this right? then you find a common factor between the first two equations in order to solve for x and y? how do you find lagrange?

Homework Statement A deck of cards is shuffled and a card is dealt. The remaining cards are shuffled and another card is dealt. The process is repeated until you have four cards dealt from the main pack. Use probability trees to determine the probability of obtaining: four red cards (not...