ĐÊ
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THI HO
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C SINH GIO
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I CÂ
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P TI
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NH – HƯƠ
́
NG DÂ
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N GIA
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I
Năm ho
̣
c: 2004 – 2005
Ba
̀
i 1 (4 điểm).
!"#"$
%&%'!"&
()
*+&(∈,-.)∈,-/.)/#*
0&
() #*() 1( 1 ) #( # #)= ⇔ + + = + +
1( 1 2)
3( 3 4)
⇔ + =
⇔ + =
5)/#&4)/43⇔3(63/43⇒(7
8&374)*594.3:71&;4);3
,<)71⇒=>?
,<)73749>?:
5@A&BCD>?"43
Ba
̀
i 2 (4 điểm). %!+<
E E
E E
E E E E
) (
( (
) ( ( )
- - + =
- -
%
F
&G
H
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I
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91:⇒9(M
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8
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(JK)&91M
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Biê
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n luâ
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n:
P,
L
<JK1⇒
1
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1
=
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Kê
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t luâ
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n:
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L
<71&!+Q
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Ba
̀
i 3 (4 điểm). R?A+<ASTU!+<UV<A9(.A:W(.
A"<A&
=+++
=+−+
4:19E
:EX9
yax
ayaax
%
F
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E( 9 1:A 4 9E:
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+ − + =
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⇔
+ + + =
+ + + =
YZ
L
A9E:M91:&9
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M364:A6E7⇔9M1:9M4:A6E7⇔
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9 1:9 4:
= −
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5Q
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⇒
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F
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Ba
̀
i 4 (4 điểm). B∆`aB<=b`.c`Rc+d9e:b!∆R`B*%'8"
T(fSag<R.`W8hc+d9e:bi*Bf&
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·
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7k
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%
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a:
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B B=
⇒BR"
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1 X X # X*
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÷
÷
Ba
̀
i 5 (4 điểm). B`aB8`ajjB8.B8r`a.cs`Ba8h<b
e*B)\
∆
`ea
7
1
-\
∆
8eB
7
E
*mVUm`aB8*
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F
&&\
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7\
aB8
\
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6\
eB8
1
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i
8
e
Ra B
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e
q
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a
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⇒\
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aeB
9X:
qtcaq*&
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1
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E
=
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1
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E
=
*
e`a
eaB
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e`
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⇒ =
94:
&
e`8
eB8
\
e`
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=
93:
u9X:.94:93:&
`ea `e8
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\ \
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= ⇒ =
5@A&
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\ E = + +
7
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1 E
+