菏泽学院 2012级
2012-2013学年第1学期
(专科)各专业《高等数学》期末试卷(B )
(110分钟)
一、判断题(每小题2分,共10分)
(对的打“√”, 错的打“×”)
( )1、数列{}n x 单调减少且有下界,则数列{}n x 必有极限; ( )2、函数在某点处不可导,则曲线在相应点处没有切线;
( )3、若)(x f 在[]b a ,上连续,在()b a ,内可导,则必存在()b a ,∈ξ,使0)(='ξf ; ( )4、如果)(1x f 、)(2x f 分别是函数)(x f 的极大值、极小值,则必有21)()(x f x f >; ( )5、函数x x f =)(在0=x 处连续但不可导.
二、选择题(每小题3分,共15分) (把答案填在题前括号内)
( )1、当0→x 时,下列变量是无穷小量的是( )
A .)1ln(3
x + B .x
e 1 C .x
1
sin D .x e
( )2、=+→x
x x 10
)21(lim ( )
A. 1
B. 2e
C. 0
D. ∞
( )3、若)(x f =)3)(2)(1(---x x x x ,则方程0)(='x f 的实根的个数为( )
A .1个 B. 2个 C.3个 D.4个
( )4、设,cos ln )(x x f = 则='')(x f ( )。
A. x 2sec
B. x cot
C. x 2sec -
D. x tan - 。
( )5、设()F x 是()f x 的一个原函数,C 为常数,则下列函数中仍是)(x f 的原函数的
是( )
A .)(Cx F
B .)(x
C F + C .)(x CF
D .C x F +)(
2、设)12sin(+=x y ,则=dy _______________。
3、曲线3x y =在点)1,1(--的切线方程为______________________。
4、曲线的拐点是3)1(-=x y _____________________。
5、____________)1cos 1
(
2
=-?dx x
。
四、计算题(每小题7分,共42分)
1、求极限x
x x 1
1lim 0
-+→
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2、求极限x
e e x
x x sin lim 0-→-
3、设函数??
?≥+<=.
0,
0)(2x x
a x e x f x
当当在),(+∞-∞内连续,求a
4、设函数)(x y y =由方程e xy e y =+确定,求0='x y
5、求不定积分?+)
ln 21(x x dx
6、求不定积分?xdx arccos
五、证明题(每小题9分,共18分)
1、证明:方程135=-x x 至少有一个根介于1和2之间.
2、证明:
x x x
x
<+<+)1ln(1 )0(>x
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