贵州省大方县2018届高三数学上学期第二次月考试题理2017102703143

12 5 60 1( ) Aab0(a0b0) ab B|a||b| ab C ac2bc2 ab 1 D 60 cos 2 2 p : x 1 4 q : 2 x 3 q p A B C D 3 xR x20( ) A xR x20 B xR x20 C x0R x200 D x0R x200 1,(x 0) x f ( x) 4 0) ,(x f { f [ f ( 1)]} 0, (x 0) A 1 B0 C D 1 5 y ax2 bx y ax b(a 0,b 0) y y y y x A x B x C x D 6. f(x)=x2+(a2-4a+1)x+2 - 1 a A.-3-1 B.--3-1+ -1- C.13 D.-13+ 7 fx R x0 fxx22x fx R Ayxx2 By xx1 Cy xx2 Dyxx2 8 f (x) e x ex 2 A R B R C R 9 algeb(lge)2clg e( D R ) Aa>b>c Ba>c>b Cc>a>b Dc>b>a 1 10(2 )( ) 4 A(0) B[0) C(0) D() 11 f (x) ( , ) f (1) 1 1 f (x 2) 1 x A[ 2, 2] B[ 1,1] C[0, 4] D [1,3] 12 F Cy2=4x F l1l2 l1 C AB l2 C DE |AB|+|DE| A16 B14 C12 D10 4 5 20 13 log ( 2 4 5) ______ y xx 1 2 14 f (x 1) [ 23] f (2x 1) 1 f ( 2) x a 15. ( , ) 22 a 2 -2- 16 y a x(a 0,a 1) y loga a x (a 0,a 1) y x3 y 3x y 1 2 1 y (1 2x 1 x 2 )2 x 2 x y (x 1)2 y 2x 1 R 70 17 10 a ea x 0 f (x) R ae x (1) a f (x) 0, 2 2 3 18( 12 )1 a1 1a 31 a 81 2 lg 500 lg lg 64 50 lg 2 lg5 2 52 19.( 12 ) xOy x C cos 4 1 1M P OM , P C | OM | | OP | 16 C 1 2 2 A (2, ) B C OAB 2 3 1 [ ] 20( 12 ) c>0 p ycx q x 2 2 11 f(x)x > p q p q c xc 21( 12 ) 100 3000 50 -3- 150 50 1 3600 2 xy 6 2 2 22 12 1(a b 0) e ab 3 2 2 A(0 , 3 b) B(a , 0) 2 1 2 E( 1 , 0) y kx 2 (k 0) C, D k CD E -4- 12 5 60 1 xyz 2x 3y 5z ( ) A2x<3y<5z B5z<2x<3y C3y<5z<2x D3y<2x<5z 2 a,b, c A.ac bc a b B.ac bc a b C.ac bc a b D.ac bc a b 3. abcd abcd1acbd>1( ) A abcd B abcd C abcd D abcd 4 2 fx[11] fx=x2 fx R y=gx=|log5x| A3 B4 C5 D6 5 f(x)2x2mx3 x[2)f(x) x(2] f(x) m ( ) A4 B8 C8 D x 2 1, x 0 6 f (x) 1 x ,x 2 0 f (x) 1 x A ( 1,1) B ( 1, ) C{x | x 0 x 2} D{x | x 1 x 1} 7 F Cy2=4x F l1l2 l1 C AB l2 C DE |AB|+|DE|( ) A16 B14 C12 D10 -5- 8. f'(x) f(x)(x R) f(-1)=0 x>0 xf'(x)-f(x)<0 f(x)>0 x ( ) A.( 1) (01) B.(-10) (1 ) C.( 1) (-10) D.(01) (1 ) 9. y=2x2e|x|[2,2] A. B. C. D. 10. f (x) x2 2x a(ex 1 e x 1) a=( ) 1 A. 2 11 f(x) 1 B. C. D.1 1 3 2 x2 2x x 0 |f(x)|ax a ( ) ln(x 1)x 0. A(0] B(1] C[2,1] D[2,0] x2 x 3, x 1, 12. ( ) fx x 2 x aR x , x 1. f (x) | 2 x R a| a 47 39] A.[ ,2] B. [ 2 3, 2] C. [ 2 3, D. [ 47 , 39] 16

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