Solve the equation for .
Answer and explanation
Correct answer: D.
**Answer: . Why not the others:** is extraneous because ; ' and ' fails to discard the extraneous root; 'No real solution' overlooks .
- Step 1: The right side must satisfy , which requires .
- Step 2: Case 1: . But , so is extraneous. Case 2: . Since , it is the only valid solution.
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