SO EASY~1÷1/R1 + 1/R2 =_______

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SOEASY~1÷1/R1+1/R2=_______SOEASY~1÷1/R1+1/R2=_______SOEASY~1÷1/R1+1/R2=_______分子分母同乘R1R2得R1R2/R1+R2(

SO EASY~1÷1/R1 + 1/R2 =_______
SO EASY~
1÷1/R1 + 1/R2 =_______

SO EASY~1÷1/R1 + 1/R2 =_______
分子分母同乘R1R2 得 R1R2/R1+R2

(R1+R2)/(R1*R2)