答:
f(x)=(2ax-x²)e^x
求导:
f'(x)=(2a-2x)e^x+(2ax-x²)e^x
f'(x)=(2a+2ax-2x-x²)e^x
函数f(x)在区间(√2,2)上单调递减,
则在该区间上f'(x)