Question

Aflati coordonatele punctului de intersectie ale graficelor functiilor: f:r-->R,f (x)= -2x+5 si g:R-->R,g(x)=x+11...va rog mult urgent dau coronita si 30 puncte

Answer 1

f(x)= -2x+5
g(x)= x+11
G f ΠGg=M(x,y)=>f(x)=y si g(x)=y=>f(x)=g(x)=> -2x+5= x+11 =>-3x= 6 |:(-3) =>x= -2 
Stim ca f(x)=y
-2*(-2) +5= y<=>y=9
Stim ca g(x)= y
x+11=y
-2+11=y
y=9
=>M(  -2; 9)