A -2xysin(2xy²)<img src="https://www.beizhujiaoyu.com/uploads/202208/161191202513961.png" width="57" height="30" /> B 2xysin(2xy²)<img src="https://www.beizhujiaoyu.com/uploads/202208/161191208722121.png" width="57" height="30" /> C 2xy²sin(2xy²)<img src="https://www.beizhujiaoyu.com/uploads/202208/161191209345301.png" width="57" height="30" /> D -2xy²sin(2xy²)<img src="https://www.beizhujiaoyu.com/uploads/202208/161191209936111.png" width="57" height="30" />

A 不连续 B 连续但左、右导数不存在 C 连续但不可导 D 可导

A <img src="https://www.beizhujiaoyu.com/uploads/202208/161191378993691.png" width="74" height="38" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/161191378478561.png" width="73" height="38" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/161191376695641.png" width="68" height="34" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/161191376146431.png" width="68" height="34" />

A f(x)在x=1处不可导 B f(x)在x=1处可导，且f'(1)=a C f(x)在x=1处可导，且f'(1)=b D f(x)在x=1处可导，且f'(1)=ab

A a=1，b=0 B a=0，b为任意常数 C a=0，b=0 D a=1，b为任意常数

A e B e-1 C e^-1 D e(1-e)

A 1 B <img src="https://www.beizhujiaoyu.com/uploads/202208/161197463639861.png" width="20" height="52" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/161197464158561.png" width="20" height="52" /> D e²

A -9dx B 18dx C -3dx D 2dx