Question

Ex 24. b)

Dau coroana!!!

Answer 1

Răspuns:

2(×+y+5)-3(×-y-2)=13

2(×+y+5)-3(×+y-2)-13=0

f(×,y)=2(×+y+5)-3(×-y -2)-13

f(×,y)=2(×+y+5)-3(×-y-2)-3'F×=?

f(×,y)=2(×+y+5)-3(×-y-2)-3'Fy=?

F×=-1

Fy=5

f=-1 ṣi fy= fx = 5 în dy/dx- fx/fy

dy/dx=-1/5

3 2x+y+4+2(3x+2y+5)=-9

3 2x + y +4 +2 3x+2y+5)+9=0

f(x, y) = 3(2x+y+4)+2(3x+2y+5)+9

f(x, y)=3(2x+y+4)+2(3x+2y+5)+9, fx =?

f(x, y)=3(2x+y+4)+2(3x+2y+5)+9, f₁ =?

fx = 12

f₁ = 7 y

fx = 12 şi f y= 7în dy/dx=-f×/fy

dy/d×=-12/7