Question

( x+ 1 phần 2) mũi 2 = 1 phần 16

x:(-1 phần 3) mũi 3 = -1 phần 3

(2 phần 3) mũi 5 nhân x = (2 phân 5)

(-1 phần 30 mũi 3 nhân x = 1 phần 8

Answer 1

(\(x\) + \(\dfrac{1}{2}\))² = \(\dfrac{1}{16}\)

\(\left[{}\begin{matrix}x+\dfrac{1}{2}=-\dfrac{1}{4}\\x+\dfrac{1}{2}=\dfrac{1}{4}\end{matrix}\right.\)

\(\left[{}\begin{matrix}x=-\dfrac{1}{4}-\dfrac{1}{2}\\x=\dfrac{1}{4}-\dfrac{1}{2}\end{matrix}\right.\)

\(\left[{}\begin{matrix}x=-\dfrac{3}{4}\\x=-\dfrac{1}{4}\end{matrix}\right.\)

Vậy \(x\) \(\in\) {- \(\dfrac{3}{4};-\dfrac{1}{4}\)}

Answer 2

\(x\) : (- \(\dfrac{1}{3}\))³  = - \(\dfrac{1}{3}\)

\(x\)              = (-\(\dfrac{1}{3}\)).(-\(\dfrac{1}{3}\))³

\(x\)             = \(\dfrac{1}{81}\)

Vậy \(x=\dfrac{1}{81}\)

Answer 3

(\(\dfrac{2}{3}\))⁵\(x\) = \(\dfrac{2}{5}\)

       \(x\) = \(\dfrac{2}{5}\) : (\(\dfrac{2}{3}\))⁵ 

       \(x\) = \(\dfrac{243}{80}\)

Vậy \(x\) = \(\dfrac{243}{80}\)

Answer 4

(-\(\dfrac{1}{30}\))³\(x\)   =   \(\dfrac{1}{8}\)

          \(x\)    = \(\dfrac{1}{8}\) : (- \(\dfrac{1}{30}\))³

          \(x\)    = - 3375

Vậy \(x\) = -3375