x + 1 = 2/x + 1In the equation above, which of the following is a possible value of x + 1?
Correct answer: B. √2
- A. 1 - √2
- B. √2
- C. 2
- D. 4
Explanation
Choice B is correct. Multiplying both sides of the equation by x + 1 gives (x + 1)2 = 2. This means x + 1 is a number whose square is 2, so (x + 1) is either √2 or −√2 . Therefore, √2 is a possible value for x + 1.
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