Question

Dada as funções: I. f(x) = 4x + 2 II. f(x) = 2x – 1 III. f(x) = -x + 2 Determine os zeros de cada função, e assinale a alternativa correspondente:
a. I: -1/2; II: 1/2; III: 2;
b. I: 2/4; II: 1/2; III: 1/2;
c. I: 2; II: 2/4; III: 1/2;
d. I: 1/2; II: 1/2; III: 2/4;
e. I: -2/4; II: 2; III: 1/2;

Answer 1

Oi!

$\boxed{f(x)= ax + b}$

I.

$f(x) = 4x + 2 \\ 4x + 2 = 0 \\4x = - 2$

$x = - \frac{2}{4}$

$\boxed{x = - \frac{1}{2}}$

II.

$f(x) = 2x - 1\\ 2x - 1 = 0 \\ 2x = 1$

$\boxed{x = \frac{1}{2}}$

III.

$f(x) = - x + 2 \\ -x + 2 = 0 \\ - x = -2 (-1) \\ \boxed{x = 2}$

Resposta: letra a.

Espero ter ajudo bons estudos!