f(x)在x=1连续且f(x)=2x+1(x≤1)& =a+lnx(x＞1),a=?f(x)在x=π连续且f(x)=co

f(x)在[a,b]上连续,在(a,b) 内可导,且 f '(x)≤0,F(x)=1/(x-a)∫(x-a)f(t)dt f(x)连续且f(x)=x+(x^2)∫ (0,1)f(t)dt,求f(x) 设f(x)在x=0处连续,且limx->0f(x)-1/x=a(a为常数),求f(0),f'(0) 一道高数题,设函数f(x)在[0,+∞)上连续,且f(x)=x(e^-x)+(e^x)∫(0,1) f(x)dx,则f( 设函数f(x）在区间[a,b]上连续,在(a,b)内可导且f'(x)≤0,F(X)=1\(x-a)·∫＜a,x＞f(t) 设函数f(x)在x=1连续,且f(x)/(x-1)的极限存在,求证f(x)在x=1可导. 设函数f(x)=x^a*sin(1/x)(x>0)试求a的值使f(x)在x=0处了连续 ,且当x=0时,f(x)=0 设函数f(x)在(-∞,+∞)上连续,且f(x)=e^x+1/e∫(0,1)f(x)dx,求f(x) 设函数f(x)有二阶连续导数,且(x->0)lim[f(x)-a]/[e^x^2-1]=0,(x->0)lim[f ‘’ 设函数f(x)有二姐连续导数,且(x->0)lim[f(x)-a]/[e^x^2-1]=0,(x->0)lim[f ‘’ 1、设函数z=f(x,y)在某区域内有二阶连续偏导数,且f(x,2x)=x,f（x,2x）对x的二阶偏导=x^2,f(x lim(x趋向于0)f(2x)/x=1,且f(x)连续,则f'(0)=