Question

Qual o valor da expressão

$a = ( - 2) + ( - 3).( { - 2)}^{ - 1} \div ( - 3)$
preciso urgente da resposta !!
me ajudeem ​

Answer 1

$a = ( - 2) + ( - 3).( { - 2)}^{ - 1} \div ( - 3)$

$a = ( - 2) + ( - 3). {( - \frac{1}{ 2})}^{1} \div ( - 3)$

$a = - 2 + ( - 3).( - \frac{1}{2} ) \div ( - 3)$

$a = - 2 + \frac{3}{2} \div ( - 3)$

$a = - 2 + \frac{3}{2} .( - \frac{1}{3} )$

$a = - 2 - \frac{3}{6}$

$a = - 2 - \frac{1}{2}$

$a = \frac{2.( - 2) - 1}{2}$

$a = \frac{ - 4 - 1}{2}$

$a = - \frac{5}{2} \: \: \: \: ou \: \: \: - 2,5$