Question

. Let a,b ,c be positive integers such that(a√2 +b)/(b√2+c) is a rational number, then which of the following is always an integer? 1.(2a²+b²)/(2b²+c²) 2.(a²+b²-c²)/(a+b-c) 3.(a²+2b²)/(b²+2c²) 4.(a²+b²+c²)/(a-b+c)

Answer 1

Answer:

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