Question

qual o valor da expressão: 3√81 - 2 . 1/2² + 4-¹

Answer 1

$3 \sqrt{81} - 2 \times {( \frac{1}{2} )}^{2} + {4}^{ - 1}$

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

$27 - \frac{1}{2} + \frac{1}{4}$

2, 4, 27 | 2

1, 2, 27 | 2

1, 1, 27 | 3

1, 1, 9 | 3

1, 1, 3 | 3

1, 1, 1 | 1

MMC = 2 . 2 . 3 . 3 . 3 = 108

$\frac{108 - 2 + 1}{4}$

$\frac{107}{4} = 26.75$