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algebra intermediate

Problem

What is the smallest number which is one less than twice its reciprocal?
Solution
The question is asking us to find the smallest value of such that . We multiply through by to clear the fraction, then rearrange terms: . This can be factored as . We could also use the quadratic formula to find : Either way, we find that or . Since we want the smallest value of , our answer is .
Final answer
-2