Question

tìm x biết

a) \(\left(-\dfrac{1}{3}\right)^3.x=\dfrac{1}{81}\)

Answer 1

\(\left(-\dfrac{1}{3}\right)^3.x=\dfrac{1}{81}\\ \Leftrightarrow-\dfrac{1}{27}x=\dfrac{1}{81}\\ \Leftrightarrow x=-\dfrac{1}{3}\)

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Answer 2

\(\left(-\dfrac{1}{3}\right)^3.x=\dfrac{1}{81}\)

\(\left(-\dfrac{1}{27}\right).x=\dfrac{1}{81}\)

\(x=\dfrac{1}{81}:\left(-\dfrac{1}{27}\right)\)

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