C-04-Q147mediumsingle_mcqlog319=?\log_3 \dfrac{1}{9} = ?log391=? (Example 6)a−2-2−2b222c−12-\dfrac{1}{2}−21d12\dfrac{1}{2}21ব্যাখ্যা19=3−2\dfrac{1}{9} = 3^{-2}91=3−2, so log319=−2\log_3 \dfrac{1}{9} = -2log391=−2.