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Problem Solving (PS) | Re: If 1&2 = 3 and 2&3 = 7, which of the following could be equal to x&y

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Bunuel wrote:

If 1&2 = 3 and 2&3 = 7, which of the following could be equal to x&y for all values x and y?


A. x^2 + y

B. y^2 + x

C. x^3 + y

D. 2x^2 + y

E. x^2 – y


This question can easily be solved by substituting the two given conditions in options and verify which ones work.
Upon substituting the options, option A fits both conditions 1&2= 1^2+2 = 3 and 2&3 = 2^2+3 = 7 Hence it in my opinion is the right answer.

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