若f（x)的一个原函数为arctanx，则下列等式正确的是A．∫arctanxdx=f（x)+CB．∫f（x)dx=arctanx+CC．∫arc

A .https://assets.asklib.com/psource/2015102915110662328.jpg B .https://assets.asklib.com/psource/2015102915111923751.jpg C .https://assets.asklib.com/psource/201510291511327285.jpg D .https://assets.asklib.com/psource/2015102915114229647.jpg

A . cosx B . -sinx C . cos2x D . -sin2x

A .https://assets.asklib.com/psource/1464852725329027246.gif =g(x)+cB .https://assets.asklib.com/psource/1464852874070008471.gif =f(x)+cC .https://assets.asklib.com/psource/1464852898726073168.gif =g(x)D .https://assets.asklib.com/psource/1464852930302018265.gif =f(x)

A . F（e ）+c B . -F（e ）+c C . F（e ）+c D . -F（e ）+c

A . F（e-x）+C B . -F（e-x）+C C . F（ex）+C D . -F（ex）+C

A .https://assets.asklib.com/psource/2015102710373934219.jpg F′（x）dx=f（x）+cB .https://assets.asklib.com/psource/2015102710373934219.jpg f（x）dx=F（x）+cC .https://assets.asklib.com/psource/2015102710373934219.jpg F（x）dx=f（x）+cD .https://assets.asklib.com/psource/2015102710373934219.jpg f′（x）dx=F（x）+c

A .https://assets.asklib.com/psource/2015102916332069206.jpg B .https://assets.asklib.com/psource/201510291633355970.jpg C .https://assets.asklib.com/psource/2015102916334937917.jpg D .https://assets.asklib.com/psource/2015102916340344437.jpg

A . F（e ）+c B . -F（e ）+c C . F（e ）+c D . -F（e ）+c

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

A．e^x+cosx B．e^x+sinx C．e^x-sinx D．e^x-cosx

A.2/3 B.-2/3 C.4/3 D.-3/4

A．e^-x(1-x)+C B．e^-x(1+x)+C C．e^-x(x-1)+C D．-e^-x(1+x)+C

A．∫f'(x)dx=g(x)+C B．∫d'(x)dx=f(x)+C C．∫f(x)dx=g(x)+C D．∫g(x)dx=f(x)+C E．∫df(x)=g(x)+C

A．sinx+C B．Cosx+C C．-sinx+C D．-Cosx+C

若f(x)的原函数为<img src='https://img2.soutiyun.com/ask/2020-08-06/965571140767096.png' />，则<img src='https://img2.soutiyun.com/ask/2020-08-06/965571158185092.png' />()

A．x²-1 B．x²+1 C．x²-2x D．x²+2x

若f(x)的一个原函数是xlnx－x，则 <img src='https://img2.soutiyun.com/ask/uploadfile/9084001-9087000/2f51f71ac0fee401adc4b78a468f1f5b.jpg' />＝__________.

A．A.1/x B．B.1/2x C．C.-1/2x D．D.-1/x

A．F’(x) B．F(x)+C C．f(x)+C D．F(x)

A、2x B、x C、x^2 D、1/x