2) \( \log _{3}(7-x)>1 \) 4) \( \log _{\frac{1}{2}}(3-5 x)<-3 \)
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Bonus Knowledge
To solve the first inequality \( \log_{3}(7-x) > 1 \), we can rewrite it in exponential form: \( 7-x > 3^1 \). This simplifies to \( 7-x > 3 \), leading us to \( x < 4 \). Remember, we need to ensure that the expression inside the logarithm is positive, so \( 7-x > 0 \) or \( x < 7 \). Therefore, the solution combines to \( x < 4 \). For the second inequality \( \log_{\frac{1}{2}}(3-5x) < -3 \), we convert it to exponential form as well: \( 3-5x < \left(\frac{1}{2}\right)^{-3} \). This simplifies to \( 3-5x < 8 \), leading us to \( -5x < 5 \) or \( x > -1 \). Additionally, we must ensure that \( 3-5x > 0 \), which gives \( x < \frac{3}{5} \). Thus the solution is \( -1 < x < \frac{3}{5} \).