1假设f(x)在[0,1]上连续,在(0,1)内可导.证:至少存在a属于(0,1),使f’(a)=(-f(a))/a.
举一反三
- 设f(x)在【0,1】上连续,(0,1)可导.f(0)=0,f(1)=1.证明:存在C属于(0,1)使f(c)=1-c
- 设f(x)在[0,1]上二阶连续可导,且f’(0)=f’(1).证明:存在ξ∈(0,1),使得
- 设函数f(x)在[0,1]上连续,在(0,1)内可导,且f"(x)<0,则____ A: f(0)<0 B: f(1)>0 C: f(1)>f(0) D: f(1)<f(0)
- 设函数f(x)在[0,1]上连续,在(0,1)上可导,且f'(x)>0,则A.()f(0)<0()B.()f(1)>0()C.()f(1)>f(0)()D.()f(1)
- 设函数f(x)在[0,1]上连续,在(0,1)内可导,且f"(x)<0,则下列结论成立的是______. A: f(0)<0 B: f(1)>0 C: f(1)>f(0) D: f(1)<f(0)