设f(x)连续,则ddx∫x0tf(x2−t2)dt=( )
举一反三
- 设F(x)=∫0x(x2-t2)f(t)dt,其中f’(x)在x=0处连续,且当x→0时,F’(x)~x2,则f’(0)=______.
- 设函数f(x)连续,则积分区间(0-x),d/dx{∫tf(x^2-t^2)dt}=() A: 2xf(x^2) B: -2xf(x^2) C: xf(x^2) D: -xf(x^2)
- 设f(x)连续,F(x)=f(t2)dt,则F'(x)等于______. A: f(x4) B: x2f(x4) C: 2xf(x4) D: 2xf(x2)
- 设F(x)=x^2/(x)f(t)dt,其中f(x)为连续函数,则limF(X)=
- 设f(x)是(-∞,+∞)内连续的正值函数,φ(x)=∫x0(x−t)f(x−t)dt∫x0f(t)dt,则( )