ʱ : һ 【步步高】高中数?模块综合检?A)新人教A版选修1-1 - 百度文库ϿʼĶ
9D [֪(42)Ľ߷Ϊyx࣭24a2bbk
babac5k5
.] a2k23
10D [Ϊf(x)axbx4
2
f(x)3axb.
a2kc5kef??
?
f??
1??a
?3
??b4
12ab0
4
8a2b4
3
13
ʽΪf(x)x4x4.]
3
11D [ͼʾOF1F2е㣬PF1PF22PO
22
ࣨPF1PF2)(2PO).
222
|PF1||PF2|2|PF1||PF2|cos 60㣽4|PO|. ֡|PO|7a
222
|PF1||PF2||PF1||PF2|28a. ˫߶|PF1||PF2|2a
22
(|PF1||PF2|)4a.
222
|PF1||PF2|2|PF1||PF2|4a.
2
ɢ٣ڵ|PF1||PF2|8a
222
|PF1||PF2|20a. ڡF1PF2УҶ
222
|PF1||PF2||F1F2|
cos 60㣽
2|PF1||PF2|
22222
8a20a4c.c3a.
22222
֡cabb2a.
b2b222. aa˫ߵĽ߷Ϊ2xy0.]
ax2
Bԣa0ʱf(x)xżCԣDԣ]
13[3,8)
Ϊp(1)Ǽ⣬12m0 m3.Ϊp(2)⣬44m>0 m<8.ʵmȡֵΧ3m<8. 14.1
412
12C [f(x)2x2ֻеa0ʱf(x)(0)ϲA
x2y2
x2y2b ˫221 (a>0b>0)һ߷Ϊy3xã3b3
abaa.
y16xĽΪF(4,0)c4.
2
֡cab16a(3a) 22
a4b12.
˫ߵķΪ1.
412
22222
x2y2
b2
152 a A(x1y1)M(x0y0) B(x1y1)
2
y0y1y0y1y20y1
kAMkBM2 x0x1x0x1x20x1
2
b222?2??b2x2?
?a0b??a2x1b?
b2????
2. 2
x2a0x1
1657
2
f(x)3x6xf(x)0 x0x2.
֡f(0)af(3)a f(2)a4f(3)54a
f(x)СֵΪaֵΪ54a. ֪a3f(x)ֵΪ57.
2???x4x3<0?1 2 2 A{x|2x9xa<0}B{x|2 2 2 2 f(x)2x9xa 2 Ҫʹ2 a9.ʵaȡֵΧ{a|a9} 18 ͼʾ|PF1|m|PF2|n 1 SF1PF2mnsin 23 3 mn. 4 ԲĶ֪ |PF1||PF2|20 mn20. Ҷ 22 |PF1||PF2|2|PF1||PF2|cos 3 2 |F1F2| 222 mnmn12. 2562 ɢ٣ڣmn. 3 64 SF1PF23. 3 19 P(xy) MN(4,0)MP(x2y) NP(x2y) |MN|4|MP|x2y2 MNNP4(x2) |MN||MP|MNNP0 4x2y24(x2)0 x2y22x 2 y8x. 2 ʶP(xy)Ĺ켣Ϊy8x. 4 20 (1)f(x)2axa 3 ??f֪? ??f3a??2?5 b??2 4 2aa1 34 aab2 3 325 f(x)x2x. 22 (2)f(x)(1,2)߷Ϊ y2x1xy10. ??yax1 21 (1)?2ȥy 2 ?3xy1? 22 (3a)x2ax20. 2 ??3a0 ?6 ?>0? 2 2axx??3a(2)A(xy)B(xy)?2 xx??3a.1 2 2 1 1 2 12 2 ABΪֱԲԭ㣬OAOB x1x2y1y20 x1x2(ax11)(ax21)0 2 (a1)x1x2a(x1x2)10. 22a2 (a1)2a210 3a3aa1(1)ȡֵΧ a1. 2 22 (1)a1ʱf(x)ln xx1 xx(0) x2x2 f(x)x(0) x2 f(2)1 yf(x)ڵ(2f(2))бΪ1. f(2)ln 22 yf(x)ڵ(2f(2))߷Ϊ y(ln 22)x2xyln 20. 1a(2)Ϊf(x)ln xax1 x1a1ax2x1af(x)a2x(0) xxx22 g(x)axx1ax(0) ٵa0ʱg(x)x1x(0) Եx(0,1)ʱg(x)>0 ʱf(x)<0f(x)ݼ x(1)ʱg(x)<0 ʱf(x)>0f(x) ڵa0ʱf(x)0 12 axx1a0x11x21. a1 aaʱx1x2g(x)0 2 ʱf(x)0f(x)(0)ϵݼ 11 b01 2ax(0,1)ʱg(x)>0 ʱf(x)<0f(x)ݼ ?1?x?11?ʱg(x)<0 ? a? ʱf(x)>0f(x) ?1?x?1?ʱg(x)>0 ?a? ʱf(x)<0f(x)ݼ 1 ca<0ʱڣ1<0. ax(0,1)ʱg(x)>0 ʱf(x)<0f(x)ݼ x(1)ʱg(x)<0 ʱf(x)>0f(x) a0ʱf(x)(0,1)ϵݼ (1)ϵ 1 aʱf(x)(0)ϵݼ