1.若a/b=2,则(a²-ab+b²)/(a²+b²)=?
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1.若a/b=2,则(a²-ab+b²)/(a²+b²)=?
1.若a/b=2,则(a²-ab+b²)/(a²+b²)=?
1.若a/b=2,则(a²-ab+b²)/(a²+b²)=?
a/b=2;
a=2b;
(a²-ab+b²)/(a²+b²)
=(4b²-2b²+b²)/(4b²+b²)
=3b²/(5b²)
=3/5
0.6答案就是这个