Question

3ª) O valor da expressão (3/4)².(-2)³+(-1/2)¹ é:
a)0
b)-5
c)36
d)5
e)9/2
​

Answer 1

Resposta:

$(3 \div 4) ^{2} \times ( - 2 ^{3} ) + ( - 0.5)$

$- 0.75 ^{2} \times {2}^{3} - 0.5$

$- ( \frac{3}{4} ) {}^{2} \times {2}^{3} - \frac{1}{2}$

$- \frac{9}{16} \times {2}^{3} - \frac{1}{2}$

$- \frac{9}{ {2}^{4} } \times {2}^{3} - \frac{1}{2}$

$- \frac{9}{2} - \frac{1}{2}$

$= - 5$

Espero ter ajudado! :)