A2 1n + B3 2n C3 1n D4n
8 4 22
3ab c
A2,5 B2,5 C2,6
3D2,7
3
9
A. 3x+22x2 x0
B. 1
2x2 x1
C.x3 x23x
D.2 1
3
x1x 2x+113x
10 a 1
2 a
A.2 B. 2 C. 1
2D.1
2
11 5=3
A 2 B 8 C 2 D 8
12
1 200
2 200 500
3 500 500 2 500
168 423
A522.8 B 510.4 C 560.4 D 472.8
13 C AB D CB DA=6DB=4 CD=_____
14 150 ______________ .
15 1200
8 2
______
16 n
________ . n
17 50% . 70%
8 5% .
______
18 0abc a c
b abc
a b c abc ________
19 200
