Ngày tải lên :
18/10/2012, 11:50
... kép.
=
−
′
−
′
−
=α
0n
'
a
'
accnaa
h.b.R
F.Rh)bb(RF.R
( )
25 6,0
56 .20 .90
26 ,2. 270010 .20 40.9047,18 .27 00
=
−−−
=
( ) ( )
22 3, 025 6,0.5,01 .25 6,0.5,01.A =−=α−α=→ .
KS Nguyn Hi Hng
32
2ị10 +2 12 (caỏu taùo)
ủai 8
3 20
3 25
20
10
30
50
1
2
4
3
- Tớnh ... KS Nguyn Hi Hng
30
ẹaởt 2 haứng: .28 3 treõnụ 22 2vaứdửụựiụỷ
60
50
15
25
5 28
2 22
ủai 8
2 25 +2 18
3
4
2
1
- Kieồm tra a
tt
.cm5a)cm(85,4
6,747,18
)1,15 ,28 ,22 .(6,7)4, 12. (47,18
a
tt
=<=
+
+++++
=
- ... <
- Từ công thức:
;25 5,0
37 .20 .90
28 ,6 .27 00
h.b.R
F.R
0n
aa
===α
0
25 5,0 α<=α
;
( ) ( )
→=−=α−α= 22 2, 025 5,0.5,01 .25 5,05,01.A
m.T475,5)cm.kG(5475 022 2,0.37 .20 .90A.h.b.RM
22
0ngh
====
m.T475,5Mm.T666,5M
ghtt
=>=
Như...