Question

Bài 1:Tìm x:

a)x:(2/3)=(2/3)^2

b)(4/5)^5:x=(-4/5)^4

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Answer 1

a.

\(x:\dfrac{2}{3}=\left(\dfrac{2}{3}\right)^2\)

\(x=\left(\dfrac{2}{3}\right)^2\times\dfrac{2}{3}\)

\(x=\left(\dfrac{2}{3}\right)^3\)

b.

\(\left(\dfrac{4}{5}\right)^5:x=\left(-\dfrac{4}{5}\right)^4\)

\(\left(\dfrac{4}{5}\right)^5:x=\left(\dfrac{4}{5}\right)^4\)

\(x=\left(\dfrac{4}{5}\right)^5:\left(\dfrac{4}{5}\right)^4\)

\(x=\dfrac{4}{5}\)

Answer 2

\(a,x:\dfrac{2}{3}=\left(\dfrac{2}{3}\right)^2\)
\(x=\left(\dfrac{2}{3}\right)^2.\dfrac{2}{3}\)
\(x=\dfrac{2}{3}^{2+1}\)
\(x=\dfrac{2}{3}^3\)
Vậy \(x=\dfrac{2}{3}^3\)
\(b,\left(\dfrac{4}{5}\right)^5:x=\left(-\dfrac{4}{5}\right)^4\)
\(x=\left(\dfrac{4}{5}\right)^5:\left(-\dfrac{4}{5}\right)^4\)
\(x=\left(\dfrac{4}{5}\right)^5:\left(\dfrac{4}{5}\right)^4\)
\(x=\left(\dfrac{4}{5}\right)^{5-4}\)
\(x=\dfrac{4}{5}\)
Vậy \(x=\dfrac{4}{5}\)