Solve .
Answer and explanation
Correct answer: D.
- Step 1: Combine the logarithms (valid for ): , so . Step 2. This gives , i.e. . Step 3. The logarithms need , so is rejected and only remains. **Answer: . Why not the others:** : makes negative, so it is outside the domain. and : must be rejected. : gives .
Practise more Algebra, logarithms and inequalities.
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