求导数值: 设H(x)=∫x201/(1+t3)dt,求H'(√2)

求导数值:
设H(x)=∫x201/(1+t3)dt,求H'(√2)
【正确答案】:H'(x)=∫x201/(1+t3)dt)' =1/(1+x6)•2x = 2x/(1+x6), 故H'(√2)=2√2/(1+23)=2√2/9.