Question

分式通分的步骤(1)1/x-y,1/x+y(2)a/2b,1/3a²,-(5/6abc)

Answer 1

解

最简公分母为(x-y)(x+y)

∴

1/(x-y)=(x+y)/(x-y)(x+y)=(x+y)/(x²-y²)

1/(x+y)=(x-y)/(x-y)(x+y)=(x-y)/(x²-y²)

最简公分母为：6a²bc

∴a/2b=3a³c/(6a²bc)

1/3a²=2bc/(6a²bc)

-5/6abc=-5a/(6a²bc)