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证明:若函数f(x)在[a,b]连续,单调增加,且f(a)<f(b),则
证明:若函数f(x)在[a,b]连续,单调增加,且f(a)<f(b),则
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证明:若函数f(x)与g(x)在[a,b]连续,且f(a)g(b),则使f(c)=g(c).
证明:若函数f(x)在[x0,x0+δ]上连续,在(x0,x0+δ)内可导,且(A为常数),则f(x)在x0处的右导数存在且等于A.
若函数f(x)非负,证明函数F(x)=cf2(x)(c>0)正好与函数f(x)在同一点达到极值.
若函数φ(x)在-∞<x<+∞时,严格单调增大,证明函数f(x)及φ(f(x))在同一点达到极值