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电大高等数学基础考试答案完整版(整理)(7月20日).pdf

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高等数学基础归类复习

一、单项选择题

1-1下列各函数对中,( C )中的两个函数相等.

=x x2?13 C.f(x)=lnx,g(x)=3lnx D. f(x)=x+1,g(x)=

x?11-⒉设函数f(x)的定义域为(??,+?),则函数f(x)+f(?x)的图形关于(C )对称.

A. 坐标原点 B. x轴 C. y轴 D. y=x

设函数f(x)的定义域为(??,+?),则函数f(x)?f(?x)的图形关于(D )对称.

A. y=x B. x轴 C. y轴 D. 坐标原点

e?x?ex.函数y=的图形关于( A )对称.

2(A) 坐标原点 (B) x轴 (C) y轴 (D) y=x

A.

1-⒊下列函数中为奇函数是( B ). A.

f(x)=(x)2,g(x)=x B. f(x)=x2,g(x)y=ln(1+x) B. y=xcosx C.

2ax+a?xy=2 D.

y=ln(1+x)

下列函数中为奇函数是(A ). A.

y=x3?x B. y=ex+e?x C. y=ln(x+1) D. y=xsinx

A

下列函数中为偶函数的是( D ).

y=(1+x)sinx B y=x2x C y=xcosx D y=ln(1+x2)

2-1 下列极限存计算不正确的是( D ).

x2=1 B. limln(1+x)=0 A. lim2x→?x+2x→0sinx1 C. lim=0 D. limxsin=0

x→?x→?xx2-2当x→0时,变量( C )是无穷小量.

sinx11A. B. C. xsin D. ln(x+2)

xxx1sinxxx当x→0时,变量( C )是无穷小量.A B C e?1 D 2

xxxsinx1x.当x→0时,变量(D )是无穷小量.A B C 2 D ln(x+1)

xx下列变量中,是无穷小量的为( B )

11x?2 Asin(x→0) B ln(x+1)(x→0) Cex(x→?) D.2(x→2)

xx?4f(1?2h)?f(1)3-1设f(x)在点x=1处可导,则lim=( D ).

h→0h精品 1

学 海 无 涯

A. f?(1) B. ?f?(1) C. 2f?(1) D. ?2f?(1)

f(x0?2h)?f(x0)=( D ). f(x)在x0可导,则limh→0hA f?(x0) B 2f?(x0) C ?f?(x0) D ?2f?(x0)

f(x)在x0可导,则limA.

f(x0?2h)?f(x0)=( D ).

h→02h?2f?(x0) B. f?(x0) C. 2f?(x0) D. ?f?(x0)

?x→0设

f(x)=ex,则limf(1+?x)?f(1)11=( A ) A e B. 2e C. e D. e

?x241dx=dx D.ln3-2. 下列等式不成立的是(D ).

1xdx=d()

x2x11dx下列等式中正确的是(B ).A.d( B. )=arctanxdxd()=?22x1+xxxx C.d(2ln2)=2dx D.d(tanx)=cotxdx

24-1函数f(x)=x+4x?1的单调增加区间是( D ).

A. (??,2) B. (?1,1) C. (2,+?) D. (?2,+?)

A.exdx=dex B ?sinxdx=d(cosx) C.

函数.函数

y=x2+4x?5在区间(?6,6)内满足(A ).

A. 先单调下降再单调上升 B. 单调下降 C. 先单调上升再单调下降 D. 单调上升

y=x2?x?6在区间(-5,5)内满足( A )

A 先单调下降再单调上升 B 单调下降 C先单调上升再单调下降 D 单调上升

. 函数

y=x2?2x+6在区间(2,5)内满足(D ).

A. 先单调下降再单调上升 B. 单调下降 C. 先单调上升再单调下降 D. 单调上升

5-1若

f(x)的一个原函数是

1,则f?(x)=(D ). A. lnxx B.

?1x2 C.

12 D. 3xx

.若F(x)是 AC5-2若

f(x) 的一个原函数,则下列等式成立的是( A )。

?xaf(x)dx=F(x)?F(a) B

?babF(x)dx=f(b)?f(a)

f?(x)=F(x) D?f?(x)dx=F(b)?F(a)

af(x)=cosx,则?f?(x)dx=( B ).

A. sinx+c B. cosx+c C. ?sinx+c D. ?cosx+c

下列等式成立的是(D ).

A. C.

?f?(x)dx=f(x) B. ?df(x)=f(x)

d?f(x)dx=f(x) D.

df(x)dx=f(x) dx?d11323233f(x)xf(x)( B ). A. B. C. D. xf(x)dx=f(x)f(x) ?dx33d11222xf(x)xf(x)dx ( D ) A B C D xf(x)dx=f(x)dxf(x)dx?221f(x)dx=( B ). ⒌-3若?f(x)dx=F(x)+c,则?x1F(x)+c A. F(x)+c B. 2F(x)+c C. F(2x)+c D.

x精品

2

学 海 无 涯

补充:

?x?x?xef(e)dx= ?F(e)+c, 无穷积分收敛的是 ??+?11dx 2x 函数

二、填空题

f(x)=10x+10?x的图形关于 y 轴 对称。

x2?9+ln(1+x)的定义域是 (3,+∞) .

x?3⒈函数f(x)=函数

x+4?x的定义域是 (2,3) ∪ (3,4 ]

ln(x?2)1函数f(x)=ln(x+5)?的定义域是 (-5,2)

2?x?x2+1,x?0若函数f(x)=?,则f(0)= 1 .

x2,x?0?1?x?2若函数f(x)=?(1+x),x?0,在x=0处连续,则k= e

?x?0?x+k,?sin2x?x?0.函数f(x)=?x在x=0处连续,则k= 2

?x=0?k?x+1,x?0函数y=?的间断点是 x=0 .

?sinx,x?0x2?2x?3函数y=的间断点是 x=3 。

x?31函数y=的间断点是 x=0

1?ex3-⒈曲线f(x)=x+1在(1,2)处的切线斜率是 1/2 .

y=曲线曲线.曲线

f(x)=x+2在(2,2)处的切线斜率是 1/4 .

f(x)=ex+1在(0,2)处的切线斜率是 1 .

f(x)=x3+1在(1,2)处的切线斜率是 3 .

π3-2 曲线f(x)=sinx在(,1)处的切线方程是 y = 1 .切线斜率是 0 2曲线y = sinx 在点 (0,0)处的切线方程为 y = x 切线斜率是 1

4.函数y=ln(1+x)的单调减少区间是 (-∞,0 ) .

2f(x)=ex的单调增加区间是 (0,+∞) .

2.函数y=(x+1)+1的单调减少区间是 (-∞,-1 ) .

2.函数f(x)=x+1的单调增加区间是 (0,+∞) .

函数 函数5-1d2y=e?x22的单调减少区间是 (0,+∞) .

?xe?dx=

e?xdx

2 . .

d22 . sinxdx=sinx?dx?(tanx)?dx= tan x +C .

若?f(x)dx=sin3x+c,则f?(x)= -9 sin 3x .

5-2

1(sinx+)dx= 3 . ??3235x3dedx= 0 . ln(x+1)dx= 0 ??1x2+1?1dx1精品 3

电大高等数学基础考试答案完整版(整理)(7月20日).pdf

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