题目内容
在式子
=
中,R1≠R2,求出表示R2的式子.
| 1 |
| R |
| R1+R2 |
| R1R2 |
∵
=
,
∴R1R2=RR1+RR2,
∴R1R2-RR2=RR1,
∴R2=
.
| 1 |
| R |
| R1+R2 |
| R1R2 |
∴R1R2=RR1+RR2,
∴R1R2-RR2=RR1,
∴R2=
| RR1 |
| R1-R |
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题目内容
| 1 |
| R |
| R1+R2 |
| R1R2 |
| 1 |
| R |
| R1+R2 |
| R1R2 |
| RR1 |
| R1-R |