Question

Resolva em R
81-25x³ 0​

Answer 1

Resposta:

$\text{Em}\ \mathbb{R}: \ x=1\text{,4}797272445982821$

Explicação passo-a-passo:

$81-25x^3=0\ \therefore\ 81=25x^3\ \therefore\\\\ x^3=\dfrac{81}{25}\ \to\ x=\sqrt[3]{\dfrac{81}{25}} \ \to\ x\approx1\text{,4}797272445982821$