Question

ПОМОГИТЕ СРОЧНО!
a) 3x+8y=14
5x-8y=2
b) 8x+3y=12
5x+7y=-13​

Answer 1

Ответ:

a)

3x+8y=14

3x+8y-14=0

f(x,y)=3x+8y-14

f(x,y)=3x+8y-14,f x =?

f(x, y) = 3x + 8y - 14, f_{y} = ?

fx=3

fy=8

dy/dy= - 3/8

5x + 8y = 2

5x + 8y - 2 = 0

f(x, y) = 5x + 8y - 2

f(x,y)=5x+8y-2.f x =?

f(x,y)=5x+8y-2,fy=?

f_{x} = 5

f y=\8

dy dx =-5/8

b)

8x + 3y = 12

8x + 3y - 12 = 0

f(x, y) = 8x + 3y - 12

f(x, y) = 8x + 3y - 12, f_{x} = ?

f(x, y) = 8x + 3y - 12, f_{y} = ?

f_{x} = 8

f_{y} = 3

(dy)/(dx) = - 8/3

5x + 7y = 13

5x + 7y - 13 = 0

f(x, y) = 5x + 7y - 13

f(x, y) = 5x + 7y - 13 f x =?

f(x,y)=5x+7y-13,f y =?

f_{x} = 5

f_{y} = 7

(dy)/(dx) =-5/7