3 U Z 35
(1)
U
(2) Uٷ
緤 U
1. ِ
緤U U U U (1
)
()
3/4, 3/5, 1/2 梿
() 19Cr-1=19C3r
r
() 跤U x3+px2+qx+r=0 a,B,Y U, E a2B
()
O y
v3 SinO -CosO = v2
(.U) h
(Sinx+iCosx)n =Cosn (II/2-x) + iSin n (II/2-x)
2. ِ
緤U U U (1 )
() R S ⢁
U
緤 {XER:x2+2x+2=0} 緤 U
() 20 UU U 1 20 ̷ ( U ) ⢁ ܹ U U ⢁
UU U U UU U
M
U, U
U ⢁ U ط
() (3x-1/2x)16 U
U
()
U U 緤 f:R---R, f(x)=log x
翘 U U
(.U) /\ABC h 緤
r r r2r3=/\2,
/\= ABC Ȥ U
3. ِ
緤U U U U (1
)
() 1-2i ן ⢁
() h Sin-1 1/v5 + Sin-1 2/v5 = II/2
() h 緤 緤 ABC , SinA+SinB+Sin C= /\ /R.r
()
1,w,w2
U, h
緤
(x-y)(x-wy)(x-w2y)=x3-y3
(.U) LSinO=10 O
4. ِ
緤U U U ( 2 )
() 跤U x2-2x
CosO + 1= 0 a ,B U m 跤U a n, Bn U
() h U 緤
4/1!+11/2!+22/3!+37/4!+
....... 8 =6e-1
() h 緤 跤U
Sin-1x+Sin-1(1-x)=Cos-1x U x=0 x=1/2 U
() x2y=2x-y U X<1 h U 緤
y+y3/3+y5/5+.....oo = 2[x+x3/3+x5/5+
...... oo]
5. ِ
緤U U U U ( 2 )
() 5x2+2/(3x+1)(x+1)2
v
() U
|6-x 3 3
|
|3 4-x 5 | =
0
|3 5 4-x |
() N Z U U N h R
U
U U 緤 (x-y), 3 U x, y,EN, h 緤 R բ U
()
b+c, c+a, a+b UU U h U
緤
a/b+c,
b/c+a, c/a+b U U
(.U) h U 緤
Co+2C1+3C2
+----- + (n+1) Cn=(n+2)2n-1
6. ِ
緤 U U 3
()
h mU h U 緤 xn-an, x+a U, U
n Z U
() ABC a =21 , b=11 , /_C=34 4230
U ,
U log 2=0.3D10300 Ltan72 38 45
=10.505
7. ِ
緤 U U 3
() A 跤U
y U
x+y+z=3, 2x-y+z=2, x-2y+3z=2
() 緤 S̐
U ǸU
S U S̐ 18 UU U 22 UU U U U, U a U tan a=1/10 S̐
U
8. ِ
緤 U U 3
() 緤 mU
20% U U U U 10 U U U A S ط
(i) U U U U
(ii) U U U
(iii) 1 U
U U
() ι 緤
ן ⢁ U
Uٷ ܻ-ܻ
梷 U U
UU U U
|z1-z2|=> |z1| - |z2|
|
U
|
|
1.
U U
2. ܃
} v SU
3. U
̉ UU U
4. U
U U
U ǸUUU U
|
|
 U U
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