已知a/b=2,求(a²-ab+3b²)/(a²+ab+6b²)的值
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已知a/b=2,求(a²-ab+3b²)/(a²+ab+6b²)的值
已知a/b=2,求(a²-ab+3b²)/(a²+ab+6b²)的值
已知a/b=2,求(a²-ab+3b²)/(a²+ab+6b²)的值
a/b=2
a=2b
将原式中的a用2b替代后化简约分进行求解即可.