Se puede determinar el valor de x² - y² si: I) x + y = 7
II) x - y = 3
A) I por sí sola
B) II por sí sola
C) Ambas juntas
D) Cada una por sí sola
E) Se requiere información adicional

step-by-step explanation:

107 units

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation: