A. \(\dfrac{24}{{7}}\)
B. \(\dfrac{7}{{24}}\)
C. \(-\dfrac{24}{{7}}\)
D. \(-\dfrac{7}{{24}}\)
B
Ta có:
\(\dfrac{1}{8} - \left( {x - \dfrac{1}{2}} \right) = \sqrt {\dfrac{1}{9}}\)
\(\begin{array}{l}\dfrac{1}{8} - \left( {x - \dfrac{1}{2}} \right) = \dfrac{1}{3}\\x - \dfrac{1}{2} = \dfrac{1}{8} - \dfrac{1}{3} = - \dfrac{5}{{24}}\\x = - \dfrac{5}{{24}} + \dfrac{1}{2}\\x = \dfrac{7}{{24}}\end{array}\)
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