Question

Considere a expressão algébrica:
R =
$| \frac{x}{4} - \frac{18}{8} | + 2x$
Se x=1, o valor de R será


(A) -
$\frac{9}{4}$
(B)
$\frac{7}{4}$
(C) 0.

(D) 4.​

Answer 1

Resposta:  D)

Explicação passo-a-passo:

$|\frac{1}{4} - \frac{18}{8} | + 2 \\\\|\frac{2-18}{8}| + 2 \\\\|\frac{-16}{8} | + 2 \\\\| - 2 | + 2\\\\+ 2 + 2 \\\\4$

Answer 2

$\sf \bigg | \frac{1}{4 } - \frac{18}{8} \bigg| + 2 \cdot1 \\ \\ \\ \sf \bigg | \frac{1}{4} - \frac{18}{8}( \div 2) \bigg| + 2 \\ \\ \\ \sf \bigg | \frac{1}{4} - \frac{9}{4} \bigg| + 2 \\ \\ \\ \sf \bigg|\frac{1 - 9}{4} \bigg| + 2 \\ \\ \\ \sf \bigg | \frac{ - 8}{4} \bigg| + 2 \\ \\ \\ \sf \bigg | - \frac{ 8}{4} ( \div 4)\bigg| + 2 \\ \\ \\\sf | - 2| + 2 \\ \\ \\ \sf 2 + 2 \\ \\ \\ \sf {\color{Blue} \boxed{\sf 4}}$

Att: Nerd1990