1)
x=12u=4(2y+3),=> Y=3/2(u-1),
X=12u,=> Y/X=u-1/8u,（你看u=3带入x,y.公约为3,=5,公约为6.）
x,y正整数
=>公约不定.
2）
同上理：Y/x=8Z+1/Z 无论z是几,公约都只是1
gmat的题吗,
If x and y are positive integers such that x=8y+12,what is t
1个回答
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