Question

Determinati coordonatele puncetlor de intersesctiea graficelor funnctiilor f,g R->R, f(x)=x-3 g(x)=5-x

Answer 1

f(x) ∩ g(x) = {A}

f(x)=g(x)

x-3 = 5-x

x+x = 5+3

2x = 8

x = 8/2 = 4

f(x) = y

f(4) = 4 - 3 = 1   ⇒   y = 1

f(x) ∩ g(x) = {A(4; 1)}