高考数学二轮复习第一篇求准提速基础小题不失分第7练基本初等函数练习文 - 百度文库

7 Ⱥ

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ȺǺʵ壬Ǹ߿ȵ㣬ѡʽ֣еѶȣʱѡյһ. [֪]

1.ݡָСȽ. 2.Ⱥ. 3.ֶκ.

4.ȺۺӦ.

һ ݡָСȽ ݡָĴСȽϷ (1)Է.(2)мֵ.

??2x0

1.֪f(x)?

?f?x1?1x0?

x

f(2 016)( )

4 0294 035

A.2 014 B. C.2 015 D.

22 D

4 0351

f(2 016)f(2 015)1f(0)2 016f(1)2 01722 017.

22.(2016ȫ)֪a2b4c25( ) A.b

Ϊa2b4ɺy2RΪ֪b

2?2??2?A.aab C.aab

baaaba432513B.a

4325x4323132323B.aba D.aba

1

baaaab C

1?1?b?1?a?1?x ָy??Ǽ֪????10ab1.0a1

2?2??2??2?ʱyaΪaaųABΪݺyxڵһΪabѡC.

5ba4.(2016㽭)֪ab1.logablogbaaba________b________.

2 4 2

15

logbatt1Ϊtt2

t2ab

ab?bb

ba2b2

xbaaaa

b2

b2a4.

5.֪f(x)Ƕ(ޣ)ϵż(ޣ0]af(log47)

bf(log13)cf(0.20.6)abcĴСϵ________.

2 cba

log13log23log49bf(log13)f(log49)f(log49)log47log490.2

2?35320.6

55?1???55125322log49 ?5?f(x)Ƕ(ޣ)ϵż(ޣ0]f(x)[0)Ǽf(0.2

0.6

)f(log13)f(log47)cba.

2 Ⱥ

(1)ָͼ(01)ͼ(10).

(2)ӦָĵԣҪעķΧͬľͬĵ. (3)ʱҪעպͼͼо.

6.֪yloga(xc)(acΪa>0a1)ͼͼн۳( )

A.a>1c>1

2

B.a>101 D.0

ɶʵ0a1Ϊyloga(xc)ͼc0ʱɺylogaxͼƽcλõģԸͼ֪0c1.ѡD. 21

7.(2017һģ)躯f(x)[x]ʾxyx122[f(x)]ֵ( ) A.{01} C.{11} B

11

f(x)x

22111

ɵãf(x)

22[f(x)]{01}.

8.(2017ȫ)f(x)ln(x2x8)ĵ( ) A.(ޣ2) C.(1) D

x2x80x4x2. tx2x8yln tΪ.

Ҫf(x)ĵ䣬tx2x8ĵ. ߺtx2x8ĵΪ(4) ຯf(x)ĵΪ(4). ѡD.

9.֪f(x)x4

9

x(04)xaʱf(x)ȡСֵbg(x)x1

2

2

2

2

2

xB.{01} D.{11}

B.(ޣ1) D.(4)

a|x+b|ͼΪ( )

3

A

x(04)ʱf(x)x1a2b1. g(x)2

|x+1|

9

51(ҽx2ʱȡȺ) x1

ͼֱx1Գƣ

[1)ΪѡA.

10.(2017һģ)֪f(x)|lg(x1)|1abf(a)f(b)a2bȡֵΧΪ( ) A.(322) C.(6) C

ͼ֪b21a2

B.[322) D.[6)

࣭lg(a1)lg(b1)a

bb1

2bb2?b1?3?b1?11

a2b2b2(b1)3223

b1b1b1b1ҽbb2 a2b

2

1ʱȡȺ. 2

b22

bb1

2b6.

ֶκ

(1)ֶκֵȷΧٴ.

(2)ֶκϵĵԣһҪעⶨķֽ㴦ֵĴСϵ.

4

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