Question

Determinati puncul de intersectie al graficelor functiilor f:R-R si g:R-R in fiecare dintre dintre cazurile :a) f(x)=2x+3 ;g(x)=3x-1 va rogg frumos

Answer 1

a)GfnOx ⇒f(x)=0⇒2x+3=0⇒2x=-3⇒ x= -3/2 ,A(-3/2;0)
GfnOy⇒f(0)=2x0+3=0+3=3,B(0;3)
b)
GgnOx⇒g(x)=0⇒3x-1=0⇒3x=1⇒x=1/3,C(1/3,0)
GgnOy⇒g(0)=3x0-1=0-1= -1,D(0,-1)