2 câu trả lời
Đáp án:
$\text{ (x-$\dfrac{4}{11}$)³ = 343 }$
$\text{⇔ (x-$\dfrac{4}{11}$)³ = 7³ }$
$\text{⇔ x - $\dfrac{4}{11}$ = 7 }$
$\text{⇔ x = 7 + $\dfrac{4}{11}$ }$
$\text{⇔ x = $\dfrac{81}{11}$ }$
$\text{ Vậy x= $\dfrac{81}{11}$ }$
Đáp án:
$\text{ (x-$\dfrac{4}{11}$)³ = 343 }$
$\text{⇔ (x-$\dfrac{4}{11}$)³ = 7³ }$
$\text{⇔ x - $\dfrac{4}{11}$ = 7 }$
$\text{⇔ x = 7 + $\dfrac{4}{11}$ }$
$\text{⇔ x = $\dfrac{81}{11}$ }$
$\text{ Vậy x= $\dfrac{81}{11}$ }$
