Question

Va rog mult . Dau coroana !!!
Aflati punctul de intersectie a graficelor functiilor:
a) f:R→R, f(x)=x-4, si g:R→R, g(x)=2x-6
b) f:R→R, f(x)=3x-4, si g:R→R, g(x)=-2x+1

Answer 1

Răspuns:

a) f(x)=g(x)

x-4=2x-6

-4+6=2x-x

x=2

y=f(x)=g(x) => y=2-4=-2 => A(2;-2)

b) f(x)=g(x)

3x-4=-2x+1

5x=1+4

5x=5

x=1

y=f(x)=g(x) => y=3×1-4=-1 => B(1;-1)