iran-konkur 2021 Q102

iran-konkur · Other · konkur-riazi_1400_specialized Laws of Logarithms Solve a Logarithmic Equation
102- Suppose $\log_5(3x-2) = 1$. Given $\begin{vmatrix} \log 5 & \log 7 \\ \log 7 & \log 5 \end{vmatrix}$, what is the value of $x$?
(1) $9$ (2) $\dfrac{17}{7}$ (3) $4$ (4) $\dfrac{7}{3}$
\textbf{102-} Suppose $\log_5(3x-2) = 1$. Given $\begin{vmatrix} \log 5 & \log 7 \\ \log 7 & \log 5 \end{vmatrix}$, what is the value of $x$?

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(1) $9$ \hfill (2) $\dfrac{17}{7}$ \hfill (3) $4$ \hfill (4) $\dfrac{7}{3}$

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