Ответ:
1/(a^2+ab)+1/(ab+b^2)=1/a(a+b)+1/b(a+b)=(b+a)/ab(a+b)=1/ab
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Ответ:
1/(a^2+ab)+1/(ab+b^2)=1/a(a+b)+1/b(a+b)=(b+a)/ab(a+b)=1/ab