设f(x)在[0,1]上有连续的导数且f(1)=2,积分（从-1到0）f(x)dx=3,则积分(从-1到0)xf'(x)dx=多少错了。积分（0到1）都是0到1

设f(x)在[0,1]上有连续导数,且f(x)=f(0)=0.证明 设f(x)在[0,1]上有连续的一阶导数,且｜f'(x)｜≤M,f(0)=f(1)=0,证明： 设f(x)在[0,1]上具有二阶连续导数,且|f''(x)| 设f(x)在[0,1]上有连续导数,f(0)=0,0 设f(x)在[0,1]上有连续导数,f(0)=0,0 设函数f(x)在[0,b]上有连续的导数,且f(0)=0,记M=max|f'(x)|0 设函数f(x)在[a,b]上有连续导数,且f(c)=0,a 设f(x)在区间[a,b]上连续,且f(x)>0,证明 f(x)在[a,b]上的导数 乘 1/f(x)在[a,b]上的导数 >=(b-a)的平方 设f(x)在[0,1]上有连续一阶导数,在（0,1）内二阶可导. 设函数f(x)在[a,b]上连续,在(a,b)内有二阶导数,且有f(a)=f(b)=0,f(c)>0(a 设f(x)在[0,1]上有二阶连续导数,且满足f(1)=f(0)及|f''(x)| 设f(x)在[a,b]上有连续的导数,且f(x)不恒等于0,f(a)=f(b)=0,证明∫(a,b)xf(x)f'(x)dx 设f(x)在[0,1]上有连续导数,且f(0)=f(1)=0,证明|∫（0,1)f(x)dx|≤1/4max(0≤x≤1)|f'(x)| 设f(x)在[0,a]上连续,在(0,a)内可导,且f(0)=0,f(x)的导数单调增,证当0 设f(x)在区间【0,1】上有连续导数,证明x∈【0,1】,有|f(x)|≤∫(|f(t)|+|f′(t)|)dt 设f(x)在区间【0,1】上有连续导数,证明x∈【0,1】,有|f(x)|≤∫(|f(t)|+|f′(t)|)dt 设函数f(x)在区间[0,1]上有连续导数,f(0)=1,且满足 ∫ ∫ Dt f'(x+y)dxdy= ∫ ∫ Dt f(t)dxdy,其中Dt={(x,y)|0 设f(x)在[0,+∞)上有连续的一阶导数,且lim(x→∞)f'(x)=a,证lim(x→∞)f(x)=∞