Question

Determine o valor da expressão:
(2-¹ + 3-²)-¹

Answer 1

(2⁻¹ + 3⁻²)⁻¹ = (1/2 + 1/9)⁻¹ =

MMC: 18

= [(1.9 + 1.2)/18]⁻¹ =
= [(9 + 2)/18]⁻¹ = (11/18)⁻¹ = 18/11

Answer 2

Oie, Td Bom?!

$= (2 {}^{ - 1} + 3 {}^{ - 2} ) {}^{ - 1}$

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

$= ( \frac{1}{2} + \frac{1}{9} ) {}^{ - 1}$

$= ( \frac{9 + 2}{18} ) {}^{ - 1}$

$= ( \frac{11}{18} ) {}^{ - 1}$

$= \frac{18}{11}$

Att. Makaveli1996