【选择题】10. 设f(x)=sin ,则f(1)+f(2)+f(3)+..........+f(200)的值是()
举一反三
- 设f(x)=,则f()+f()+f(2)+f(3)的值为 ( )
- 设函数f(x)=a|x|(a>0),且f(2)=4,则( ) A: f(-1)>f(-2) B: f(1)>f(2) C: f(2)<f(-2) D: f(-3)>f(-2)
- 设\(z = f(x,y)\),\(x = \sin t\),\(y = {t^3}\),则全导数\( { { dz} \over {dt}} = \) A: \({f'_x} \sin t+ 3{t^2}{f'_y}\) B: \({f'_x} \cos t+ {t^2}{f'_y}\) C: \({f'_x} \cos t+ 3{t^2}{f'_y}\) D: \({f'_y} \cos t+ 3{t^2}{f'_x}\)
- 设函数f(x)=(x-x^3)/sinπx,则f(x)
- 设f(cos x) = 3 − cos 2x,则f(sin x) =()