Question

2) Considere a Função do 1º Grau F(x) = -3x + 2. Determine os valores de x para que se tenha: a. F(x) = 0 b. F(x) = 11 c. F(x) = -1/2. Assinale a alternativa com a resposta correta:​
a) 2/3, - 3, 5/6
b) 3/2, 3, 1
c) 2/3, 3, - 5/6
d) 3/2, -3, 1

Answer 1

a)

$\mathsf{-3x+2=0}\\\mathsf{3x=2\to~x=\dfrac{2}{3}}$

b)

$\mathsf{-3x+2=11}\\\mathsf{3x=2-11}\\\mathsf{3x=-9\to~x=-\dfrac{9}{3}=-3}$

c)

$\mathsf{-3x+2=-\dfrac{1}{2}}\\\mathsf{-6x+4=-1}\\\mathsf{6x=4+1}\\\mathsf{6x=5}$

$\mathsf{x=\dfrac{5}{6}}$

$\huge\boxed{\boxed{\mathsf{\maltese~~Alternativa~a}}}$