( (r1 nt r2) nt (r3 // r4 )) // r5 a. Tính Rtđ AB = ? b. Cho UAB =

( (r1 nt r2) nt (r3 // r4 )) // r5
a. Tính Rtđ AB = ?
b. Cho UAB = 20KV, Tính IAB = ?

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