꼶ѧѧп
ʱ䣺120 ֣150֣ һ ѡ(18) һѡ ÿС3֣18֣ 15෴ ( )
A5 B. 5 C5 D2˵Уȷ ( )
AͳΪ BΪ෴֮Ϊ㣻 CľֵȣôһȣD0С 3xķ2xk40Ľx3ôkֵ( )
A10
B10 C2
D2
1 54ʽ?3?x2y5Ĵǣ
A6 B7 C5 D2 5aab+cȵʽǣ
Aab+c
Ba+bc Cbc Dcb
6ʽ|x1|-3ȡСֵʱxڣ
A1
B2
C3
D4
ڶ ѡ(132) (ÿ3֣30)
715000mÿѧʾΪ m. 8дһ1С4 .
9nΪ,ʽn(n?1)(n?2)ʾʵ . 10ʾ2ĵ3ȵλĵʾ . 11a+3
1Ϊôa= 4a?212?a?3?x13֪ʽ??7?0һһԪһη̣a . 1a?13xy3xy2?bͬôa?bֱֵ . 214ʽx23kxy3y2+6xy8xyk=
15֪x?1ʱʽax?bx?5ֵΪ9ôx??1ʱʽax?bx?5ֵΪ . 16йɵһЩʽ?xyxy?xyxy?xyxy?nʽ(nl
224364851061233)ɱʾΪ . ⣨102֣ 1712֣㣺
(1) 10(16)+(24) (2) 5(
35)
53
112
(3) 27(3)6+5 (4) (1+275)(24)
38
18ֵ2С⣬ÿС4֣8֣ 13a+2ab4ab+2a (2) Ȼֵ?
19 ̣ⷽ4С⣬ÿС4֣16֣ 1 4?3x?6?4x
23x?2?2x?5??5?x?3??x
2
2
32211m?mn?(m2?mn?2)m=1n=2 43433?5x3x?5? 32x?2x?1??3 4
0.20.53 1?
208֣*ǹ涨һ㷨a?b?a?b 15???1?ֵ 2??4??x?2?
218֣(1) Ϸֱʾ3ĵ㣺(4)?3.5+(
24xxֵ 312)
(2) xy϶Ӧͼʾ
xy0xyСá<ӣ ڻx?yy?x+y
228֣֪A2a3ab2a1Baab1
14A(3A2B)ֵ 2A2Bֵaȡֵأbֵ
238֣֪ţAһУ涨˶+˶ӿʼеĸ·̣λcmΪ+75108+96+12+4 1AϱʾΪ3ţͣϺδͨ˵ 2ţٶΪÿ0.5cmţһ˶룿
248֣ͼʾҪи⣺
2
2
1ͼ٣x=1ʱy=__________
2ͼڣһŵڣӦ__________ڶڣӦ__________ڣӦ__________
3ͼۣΪ3ʱΪ__________
2512֣ߵУһȦжĸ
ڵڶеڶеǸʾΪaֱΪbcd 1ֱúaĴʽʾbcd
2ĸĺͣúaĴʽʾҪϲͬ
3ĸĺͻ51ᣬʱaֵᣬ˵ɣ
26(14) ͼAʾaBʾbCʾcbСaba?2+(c
7)=0
(1) a= b= c=
(2) ۵ʹACغϣB ʾĵغϣ
(3) ABCʼ˶Aÿ1λȵٶ˶ͬʱB͵Cֱÿ2
λȺ4λȵٶ˶tӹAB֮ľʾΪABAC֮ľʾΪACBC֮ľʾΪBCAB= AC= BC= (útĴʽʾ)
(4) ʣ3BC2ABֵǷʱtı仯ı? 仯˵ɣ䣬ֵ
2