1.在 (-infty ,0) 上,下列函数中无界的函数是 ()-|||-(A) =(2)^x; (B) =arctan x; (C) =dfrac (1)({x)^2+1}; (D) =dfrac (1)(x)

函数 =dfrac (1)({x)^2+1} 是 ()A、偶函数B、奇函数C、单调函数D、无界函数A、偶函数B、奇函数C、单调函数D、无界函数

函数 (x)=dfrac (cos (x-2))(1+{x)^2} 在 (-infty ,+infty ) ()-|||-A 周期函数-|||-B 有界函数-|

单选题-|||-(中)-|||-已知函数 =dfrac ({x)^2+1}(x) ,则 ^m= __-|||-A .dfrac ({x)^2-1}({x)^2}

(2) lim _(xarrow infty )((dfrac {x+1)(x-1))}^-dfrac (x{2)}= () ;-|||-(A)1 (B) ^d

6、极限 lim _(xarrow +infty )(sqrt ({x)^2+x}-sqrt ({x)^2+1})= () 。(较难)-|||-A、0 B、 d

1.求下列极限.-|||-(4) lim _(xarrow +infty )dfrac (ln (1+dfrac {1)(x))}(dfrac {pi )(2)

3、设 (x,y)=arctan dfrac (x)(y), 则 (1,1)=-|||-(A)1; (B)0; (C) dfrac {1)(2),dfrac

求下列函数的微分:-|||-(1) =dfrac (1)(x)+2sqrt (x);-|||-(2) =xsin 2x;-|||-(3) =dfrac (x)(

求下列函数的微分:-|||-(1) =dfrac (1)(x)+2sqrt (x);-|||-(2) =xsin 2x;-|||-(3) =dfrac (x)(

下列函数不是指数函数的是 A.=((dfrac {1)(2))}^x.A.=((dfrac {1)(2))}^x.A.=((dfrac {1)(2))}^x.A