DATE
数学
TITLE
(1) 1 - 4׳ (2)82²8³ ) + x + (2)√90-8√2x²√5 (4) 7)
x 3
16
17-12
8x²yx Zxy
X
10
-9√10
=-5
120
A(5) 81 x 4 TCX-360
120
9
3241 x 360 10
7080108
XO, TL
=
=
=
(4)
8301017 BZ
10通
12
= 16x7²
+39) (4) √x+y = 15x = 9
√3x +21=39
ty=6
12
(1) 25
V
AA BCtEta2" LABD=609
2B
20
7回 (1)黒=2個白=43個
○⑤(1) △ABDと△CBEにおいて (2) 1200
正三角形なので、BE=BD…..①
EBC=60°
108 TL + 47
+4匹
= (12π cm²
x360
(5) おうぎの公式弧の長さ
a
Top ²x
2irx 360
27720
3
X-3
8/2015/
1/2x
22
5
x-2
367CCM²
y = - = x
y=
15.
41 (4/6 (²) b = √30-3a (6) 3/8 (38)
=
32
(n-1)(3)(n-1) ²
=-
XIX
6匹→半径
I
n
=3(x-2)-5(x-3)
=386-515
= -2x+9
(3)
オ
(1) 8311) (2) Y = ² x (3)/2cm ²
(¹) 3a+2b = 30
2b = 30-3a
2
30-3a
b
2
2
√5