[单选题]设y=x(x-1)(x-2)…(x-20),则f ′(0)=( ).A.20! B.0 C.∞ D.-20!
[单选题]设f(x)=x(x-1)(x-2),则方程f′(x)=0的实根个数是()。A.3B.2C.1D.0
[单选题]设f(x)=x(x-1)(x-2),则方程f′(x)=0的实根个数是()。A.3B.2C.1D.0
[单选题]设f(x)=x(x-1)(x-2),则方程f′(x)=0的实根个数是()。A.3B.2C.1D.0
[单选题]设f(x)=(x-1)(x-2)…(x-2019),则方程f′(x)=0有()个实根。A.2017B.2018C.2019D.2020
[问答题]设随机变量X服从参数为λ的泊松分布,且已知E[(X-1)(X-2)]=1,则λ=-----------.
[问答题]设随机变量X服从参数为λ的泊松分布,且已知E[(X-1)(X-2)]=1,则λ=--------------.
[单选题]设f(x)为实系数多项式,以x-1除之,余式为9;以x-2除之,余16,求f(x)除以(x-1)(x-2)得余式为().A.2B.-7x+2C.-7x
[单选题]设f(x)为实系数多项式,以x-1除之,余式为9;以x-2除之,余16,求f(x)除以(x-1)(x-2)得余式为().A.2B.-7x+2C.-7x
[单选题]设随机变量X服从参数为λ的泊松分布,若E(X-1)(X-2)=1,则参数λ=()。A.3B.-1C.1D.2