设,则线段的垂直平分平面为( )。2439f918200b954d664875f42781e92b.png186817467015dea52fde0d56145f17fd.png
举一反三
- f(x)在[0,1]上有连续的二阶导数,f(0)=f(1)=0,任意x属于[0,...715af2ac3f81f8.png"]
- 设f(x)=(1+x)cosx,欲使f(x)在x=0处连续,则f(0)定义为()。 A: f(0)=0 B: f(0)=e-1 C: f(0)=1 D: f(0)=e
- 设f(x)为连续函数,则等于() A: f(2)-f(0) B: 1/2[f(11)-f(0)] C: 1/2[f(2)-f(0)] D: f(1)-f(0)
- 设随机变量X的分布函数为F(x) = P{X ≤ x },则P{X = a }=() A: F(a) B: 0 C: F(a + 0)- F(a) D: F(a) – F(a – 0)
- 设随机变量X的分布函数为F(x) = P{X ≤ x },则P{X = a }= ( ). A: F(a) B: 0 C: F(a + 0)- F(a) D: F(a) - F(a - 0)