Let , . The inverse function has rule and domain:
Answer and explanation
Correct answer: B. with domain
- Step 1: Complete the square: . On the range is .
- Step 2: Swap and solve: , so .
- Step 3: Since the original domain has , take the negative root: , with domain equal to the range of , .
Answer
on .
Why not the others: The positive root gives outputs , outside the original domain; is the range of the inverse, not its domain; misreads the completed square.
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