Question

Sabendo que \textup{a} = \left ( -3+\frac{7}{2} \right )^{-2} , o valor de 5a é igual a:

Answer 1

Olá,

$a = ( - 3 + \frac{7}{2} {)}^{ - 2}$

$a = ( - \frac{6}{2} + \frac{7}{2} {)}^{ - 2}$

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

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

$a = ( - 2 {)}^{2}$

$a = 4$

Logo:

$5a = 5 (4)$

$5a = 20$

Answer 2

Resposta:

20

Explicação passo-a-passo:

$a=(\frac{-3.(2)+7}{2})^{-2}$

$a=(\frac{-6+7}{2})^{-2}$

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

$a=(\frac{2}{1})^2$

$a=4$

$5a=5.4=20$