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anonymous
 one year ago
PLEASE HELP!!!!
Let u = <7, 3>, v = <9, 5>. Find 4u  3v.
anonymous
 one year ago
PLEASE HELP!!!! Let u = <7, 3>, v = <9, 5>. Find 4u  3v.

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Jacob902
 one year ago
Best ResponseYou've already chosen the best response.1(4y+2x5)dx+(6y+4x1)dy=0, y(1)=2 i tried solving by seperation of variables but i didnt get newhere with that

Jacob902
 one year ago
Best ResponseYou've already chosen the best response.1You can do a linear transformation of the variables to get rid of the "5" and "1". If 4y + 2x  5 = 0 and 6y + 4x  1 = 0 then y = 9/2, x = 13/2 So let x = u  13/2 y = v + 9/2 du = dx dv = dy (4v + 2u) du = (6v + 4u) dv dv/du = (2v + u)/(3v + 2u) That is a homogeneous equation so substitute v = wu dv/du = w + u dw/du w + u dw/du = (2w + 1)/(3w + 2) Now you can separate the variables and integrate. EDIT: Duh!!!!! <facepalm> I just saw your other question You don't need to do all that stuff, it's an exact equation!!! Integral is 4xy + x^2  5x + 3y^2  y = c y(1) = 2 8 + 1 + 5 + 12  2 = c c = 8

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0honestly none of this makes sense to me @Jacob902
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