问题标题:
【(1)R=(R1*R2)/(R1+R2)(注:R不等于R2),求R1(2)已知(S/V)-S/(V+2)=1,求S】
问题描述:
(1)R=(R1*R2)/(R1+R2)(注:R不等于R2),求R1
(2)已知(S/V)-S/(V+2)=1,求S
韩光明回答:
原式=R(R1+R2)=R1R2=RR1+RR2=R1R2RR2=R1R2-RR1RR2=R1(R2-R)RR2/(R2-R)=R12:S(V+2)/V(V+2)-SV/V(V+2)=1[S(V+2)-SV]/V(V+2)=12S/V(V+2)=12S=V(V+2)S=V(V+2)/...
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