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jmismybaebangtanismyyouth
2 năm trước
Chứng minh công thức tính điện trở tương đương của đoạn mạch gồm hai điện trở R1, R2 mắc song song: $\frac{1}{Rtđ}$ = $\frac{1}{R1}$ + $\frac{1}{R2}$ từ đó suy ra Rtđ= $\frac{R1.R2}{R1+R2}$
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