设f(x)在[0,1]上有二阶连续导数,且满足f(1)=f(0)及|f''(x)|

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/17 15:39:54
设f(x)在[0,1]上有二阶连续导数,且满足f(1)=f(0)及|f''(x)|
xj@ }oI Si` )ڃMV컔MziJ\=0fư*DEMC]:(Lh AL/2DT6*6BM㸡I\EԄWt'NGE Y.U1A!.C&QD^2n۲._QDA.N<=?%

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[0,1]上有二阶连续导数,且满足f(1)=f(0)及|f''(x)|<=M(x∈[[0,1],证明一切x∈[0,1],|f'(x)<=(M/2)

设f(x)在[0,1]上有二阶连续导数,且满足f(1)=f(0)及|f''(x)|
Taylor展式:对任意的x,
f(0)=f(x)+f'(x)(0-x)+f''(c1)(0-x)^2/2,
f(1)=f(x)+f'(x)(1-x)+f''(c2)(1-x)^2/2.
两式相减,得
f'(x)=f''(c1)x^2/2-f''(c2)(1-x)^2/2,
取绝对值并利用条件得
|f'(x)|<=M/2(x^2+(1-x)^2)<=M/2.
最后的不等式是因为x^2+(1-x)^2在[0,1]
上的最大值是1.

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[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f(x)在[0,1]上有连续一阶导数,在(0,1)内二阶可导. 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]上有二阶连续导数,证明:∫ (-1,2)f(x)dx=1/2[f(1)+f(2)]-1/2∫(1,2)(2-x)(x-1)f(x)dx 设函数f(x)在[0,1]有二阶连续导数 求 ∫(0积到1)[2f(x)+x(1-x)f''(x)]dxRT 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f(x)在[0,1]上有二阶连续导数,证明:∫(-1,2)f(x)dx=1/2[f(1)+f(2)]-1/2∫(1,2)(2-x)(x-1)f(x)dx设f(x)在[0,1]上有二阶连续导数,证明:∫ (-1,2)f(x)dx=1/2[f(1)+f(2)]-1/2∫(1,2)(2-x)(x-1)f(x)dx 导数连续问题设函数f(x)=x^ksin(1/x) ,x不等于0 (k为整数) 0 ,x=0 问k满足什么条件,f(x)在x=0处导数连续 设f(x)在x=1处具有连续导数,且f ‘(1)=3,求f '(cos√x),x趋近于0+ 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)=xg(x),其中g(x)在x=0处连续,且g(0)=1,试用导数定义求f'(0). 积分应用 设f (x)在[0,1]上具有二阶连续导数,若f ( π ) = 2,∫ [ f (x)+ f (x)的二阶导数]sin xdx =5,求f (0) .. 设f(x)在x=1处具有连续的导数,且f'(1)=1/2,