Question

1) Dada a função f(x) = 2X + 1, determine:
a) O valor dos coeficientes de a e b (coeficiente angular e linear); b) Classificação;
c) O zero da função;
d) f(3), f(-2) e f(0);

Answer 1

Resposta e xplicação passo a passo:

$1 - f(x)=2x+1\\\\a)\ f(x)=ax+b-->funcao\ afim\\\\\\a=2\ e\ b=1\\\\\\b)\ Funcao\ de\ primeiro\ grau\\\\\\c)\ f(x)=2x+1\\\\0=2x+1\\\\2x=-1\\\\x=-\frac{1}{2}\\\\Substituindo\ para\ provar:\\\\f(x)=2(-\frac{1}{2})+1\\\\f(x)=-\frac{2}{2}+1\\\\f(x)=-1+1=0\\\\\\d)\ f(x)=2x+1\\\\f(3)=2(3)+1=6+1=7\\\\f(-2)=2(-2)+1=-4+1=-3\\\\f(0)=2(0)+1=0+1=1$