已知公式 1⼀R = 1⼀R1 +1⼀R2 ,R 不等于R2 ,求R (写出过程)

2025-04-04 21:54:29
推荐回答(2个)
回答1:

1/R = 1/R1 +1/R2

1/R=(R1+R2)/R1R2

R=R1R2/(R1+R2)

回答2:

1=R/R1+R/R2 1/R1R2=RR1+RR2 1/R1R2=R(R1+R2)
R=R1R2/R1+R2