gwd math 28-24

jasoncz1

1) and 2) do not have to  be the same answer.  As long as you can use the information given to solve what's been asked. 
take 1),  x=2/a, y=2/b, so xy=4/ab.  这和2)不一样的.  你是对的, 不用为答案不一样而操心.