7/24/2019 bt ly 11 ghep nguon

1/2

1. Cho mch in nh hnh v: I E, r

.8,1;2;2321

=== RRR

.2,0;3 == rVE

R1R3

R2a. Tnh in r! "n# "n# mch n#o$i.%. Tnh c&n# ' ()n# in mch chnh v$ c&n# ' ()n# in ch* +a c-c in r!.c. Tm cn# / a nhi rn R2.

a.

=+

= 121

2112RR

RR

R

R4 R125 R34 2,8

%.

ArR

EI

N

1=+

=

67C4 IR124 1 .c. Tm I1, I2, I3, 92:

.:,01

1 AR

UI

AC==

.:,02

2 AR

UI

AC==

I34 I4 17.2

222 IRP =

4 0, ;.2. Cho mch in / in 'n# 4?, in r! ron# r42, mchn#o$i #=m 3 in r! R1 4, R2 410, R3 43m@c nAi iB. Tnh hi in hB #iDa hai R1.

R123 4 R15 R25 R3418F

G H (n# Jnh KL Mhm cho o$n mch:

ARr

I 3,0123

=+

=

G R1n R2n R3 nn: I14 I24 I34 I 4 0,37G 614 R1I14 1,

7/24/2019 bt ly 11 ghep nguon

2/2

3. Cho mch in nh hnh v. NOi in c> / in 'n# 4 1, PQ, in r! ron# r4 1.in r! mch n#o$i R 4 3, . Tnh c&n# ' ()n# in ! mchn#o$i.

Vb

:,S: ==

G== TTrr

b

G H (n# Jnh KL Mhm cho o$n mch:Rr

I

b

b

+=

4 17