【单选题】【消耗次数:1】
已知函数f(x)可导,则△x→0时, lim [f(x0-x)-f(x0)]/x
-f(x)
f(-x0)
f(x0)
2f(x0)
参考答案:
复制
纠错
相关题目
【单选题】 若(x0,f(x0))是连续函数y=f(x)的拐点,则f(x0)=( )
①  等于零
②  不存在
③  等于零或不存在
④  以上都不对
【判断题】 若f(x)在x=x0处可导,则|f(x)|在x=x0处可导
①  正确
②  错误
【判断题】 若f(x)在x=x0处可导,则|f(x)|在x=x0处不可导
①  正确
②  错误
【单选题】 x→x0时,lim f(x)存在是函数f(x)在x0处有定义的
①  充要条件
②  必要条件而非充要条件
③  充分条件而非必要条件
④  既不是充分条件也不必要条件
【判断题】 若f(x)在x=x0处可导,则|f(x)|在x=x0处不连续
①  正确
②  错误
【判断题】 若f(x)在x=x0处可导,则|f(x)|在x=x0处连续但未必可导
①  正确
②  错误
【单选题】 若函数f(x)在点x0处取得极值,则( )
①  f(x0)=0
②  f(x0)不存在
③  如果f(x0)存在,则f(x0)=0
④  2f(x0)=0
【判断题】 若x0是f (x)的极值点,则一定有f (x0)= 0
①  正确
②  错误
【单选题】 设函数f(x)=e^x (x≠0),那么f(x+1 )*f(x+2 )为( )
①  f(x+1)+f(x+2)
②  f(x+1+x_2)
③  f(x+1* x+2)
④  f(x+1/x+2)
【判断题】 设个体域 D={0,1}, 谓词F(x):x0, G(x):x1。命题“$x(F(x) ùG(x))”的真值为假。
①  正确
②  错误
随机题目
【单选题】 I charge the man____ receiving stolen goods.
①  in
②  with
③  at
④  on
【单选题】 The ____ problem of bring a spaceship back from the moon has been solved.
①  technical
②  technological
③  technique
④  technology
【单选题】 The boy has admitted to ____ the window while playing football yesterday.
①  breaking
②  having been broken
③  break
④  be breaking
【单选题】 We expect Mr. White will ____ Class One when MissJane retires.
①  take over
②  take up
③  take off
④  take to
【单选题】 My pain ____ apparent the moment I walked into the room, for the first man I met asked sympathetically: “Are you feeling all right?”
①  must be
②  must have been
③  had been
④  had to be
【单选题】 ____ there is little we can do to modify the weather, we can at least know what kind of weather to expect.
①  Since
②  When
③  While
④  Unless
【单选题】 None of us can work out the puzzle, _____ we?
①  can
②  can’ t
③  do
④  don’ t
【单选题】 Little Tom is an orphan(孤儿). _____, he has to make a living by himself.
①  A child as he is
②  Child as he is
③  Child as is he A child though he is
【单选题】 While driving along the treacherous road, ____.
①  my right rear tyre blew out
②  my right rear tyre had a blowout
③  I had a blowout on my right rear tyre
④  I had my right rear tyre blowout
【单选题】 She has breakfast at seven everyday, _____?
①  has she
②  hasn’ t she
③  does she
④  doesn’ t she