chuyên đề hệ phương trình
Bạn đang xem bản rút gọn của tài liệu. Xem và tải ngay bản đầy đủ của tài liệu tại đây (63.16 KB, 3 trang )
.
=−+
=++
0
2
2
yxyx
y
x
yx
−=++
−=+−
222
22
)yx(7yxyx
)yx(3yxyx
=+−
=+−
1
1
23
2234
xyxyx
yxyxx
x x y y
x y x y
4 2 2
2 2
4 6 9 0
2 22 0
− + − + =
+ + − =
+=−
+=+
yxxy
xyyx
233
233
3)1(
3)1(
.67
=++
=+
3
32
.109
22
24
yyx
yxx
=−−−
=+−+
38923
143
22
22
yxyx
yxyx
20.
=−++
=+−+−
0222
0964
22
224
yxyx
yyxx
21.
+−=−+
+−=+
5223
1222
22
22
yxyxyx
xyyyx
22.
−=−−
=−+
22
2
1
2
22
2
yxyy
y
xx
31.
=−++−
=++−+
0244
0)12)(1(2
2
2
yxxyx
yxxy
34.
++=+
=+++
272)(
41
22
22
yxyxy
yxyyx
=−++
=+++
24
527
.43
yxyx
yxyx
+=
=−−+−+
122
122
.44
33
22
yx
yxyxx
=
+
+
=
+
+++
1
1
2
13
)(
5
4)(8
.47
2
22
yx
x
yx
xyyx
(
)
(
)
+=−++
=++++
832224
111
.53
2
22
yxx
yyxx
57.
−=−++
=+−+
)1(3)1()(
0232
2
22
yyxyxxy
xyxyx
=−++
=−+−
0101112835
039222114
.58
22
22
yxyx
yxyx
+−=−−+
+=−+++
3
23
2
23353
2332
.60
xxyyy
xyyyx
( )
+=++
−+=−−
xxyyx
yxyx
2
3
22
2820)12)(2(
.61
=+++
++++=+
xyyx
xyxyxyx
8483
47)(7
.62
22
223
=−++
−=+−+
0
123
.64
yxyx
yxyx
−−+−=−++
=−+−+
)221()(11
)21(23
.68
22422
422242
xyxxxyx
yxxyxyx
++=+
−+=+−+−
xyxxy
yyxxyxxx
2443
13)3(1
.69
22
−+=−
−=−−+
xyx
yxyxyx
3216
4
.70
2
=++−+
+−=−
41)24()24(
29
.71
yyyxx
yxyx
=+−+
=−++
0152
05
.72
2
22
yyxy
yxxyyx
−=−
+−=−
xyyx
xyyx
22
3222
.73
33
2222
=+−++
=+−
01312632
02
.75
23
222
xyxx
yxyx
=++−
=++−
02)63(
01)3(
.76
22
22
xyxy
xyxy
−=+
+=+
13
122
.77
33
33
xyyx
xyyx
=+
=+
xyxy
yxyx
10
40
.79
23
23
=++
−=+++
12
32
.80
22
yxxy
xyyyxx
(
)
(
)
−=
−
+
=++++
12
35
1
111
.83
2
22
x
y
y
yyxx
=−+−
=−−−
32667
111
.84
xyxy
xyyx
=−−++
=−++
01344
072
.86
223
2
yxxyyxy
yxxyy
−=+
=+++
3
12444
.87
22
xyy
yxyx
=+−
=+−−+−
4
06242)3(
.88
34
xyxyy
yyxyxyy
=+++
=−+−−
2321
012
.89
2
yx
yxxyy
=−−
=+++
102)2(
7)(2
.91
22
xxyy
yxyx
−+=+−
=−++
)9(9
211
.93
342
3
yyxyyx
yx
+=+
+=++
662
922
.97
2
2234
xxyx
xyxyxx
=−++
+=−
yyxyx
yyx
32
12
.99
2
=++
=++
222
8134
6132
.101
yxyyx
yxxy
=++
=++
222
131
71
.102
yxyyx
yxxy
+=++
=+−+−
222
322
)(2)(
0)(2345
.104
yxyxxy
yxyxyyx
=−−−+
=−++
0542
01532
.105
224
22
yxyx
yxyx
−=−
+=+
22
22
2
11
)(2
2
11
.106
xy
yx
yx
yx
+=+−
+−+=−
33)2(
)5)(2011(32
.107
2
xxyy
yyyx
=−
−=−+−
369
)(3
.110
22
22
yx
yxyxyxyx
=++−
+=++
21
222
.111
22
xyxy
xyyxyx
=
−+=−+
1
452
.112
xy
yxyyxx
+
−
=+
=−+−
yx
xy
yx
xyyx
21
2
1
11
.113
22
=−−
−=+−+
12)4)(4(
7)(4
.114
22
yxxy
yxyx
=++
=−−+−
yxx
yyxyx
32
28309
.116
2236
+
+
=+
−=++
2
1
14
.117
2
22
x
y
yx
yxyyx
−=−+
=+−−
yxyxyx
yyyxx
23
3)1(2
.121
22
22
=+−
−−=+−+−
3
)23(2122
.122
2
24242
xyx
yxyxyyx
=−++
=−−−
02
11
.124
22
xyxyxy
yxx
=+
=++
12
7
.125
2
2
x
y
x
yxyxy
+=+
+=+
xxy
yxxyyx
9267
9432
.127
2
22
=−++
−−=+
416
2322
.128
3
yx
yxyx
=+−−++
=+−+−
01467
18)432)(432(
.129
22
22
yxxyyx
yyxx
=+++
−−=+++
64224
2)32(12)12(2
.130
3
yx
yyxx
=−
++=++
7)(
99
.131
33
22334
xyx
xyxxyyyxx
++−=
−−=−+
xxyxy
yxxxy
1212
13122
.132
2
3
−=+
=−
yxyx
yx
9432
35
.133
22
33
−−=−−
+++=+
121
243
.134
2
233
yyx
xxxyy
=−−+
=−+
0282
148
.135
44
233
yxyx
xyyx
+−=−+
=+
)13(
25
57
34
5
1
.137
2
22
xyxx
yx
=−
−=−
3)(
2
.138
322
44
yx
yyxx
141.
2
3 2 4 5
2
2 5 0
x y x y
y
x y
x
− + + =
− + =
142.
3 3
1 1
( 4 )(2 4) 36
x y
x y
x y x y
− = −
− − + =−
143.
−=−+
−=−
1724
11716
222
yxxy
yyx
145.
(
)
2 2
2
3 3
3
x y x x y
x y x x
+ + + = −
+ + = +
146.
( )
3
2
2
7
2 2 2
4
x y
y x x
− + =
+ − + = −
149.
( )
2
2 1 1 2 2 1 8
2 1 2 13
x y x
y y x x
− − + − = −
+ − + =
150.
3 3 2 2 2
1 2 1 2
2 2 3 3
y x x x
x y x y xy x y
− + + = + + −
− + = − +
