<4>设x=62,表达式x>=60&&x<70||x==1的值为.
<4>设x=62,表达式x>=60&&x<70||x==1的值为.
函数f(x)=x3-3x的递减区间是( ) A: (-∞,-62)或(62,+∞) B: (-1,1) C: (-∞,-1)或(1,+∞) D: (-62,62)
函数f(x)=x3-3x的递减区间是( ) A: (-∞,-62)或(62,+∞) B: (-1,1) C: (-∞,-1)或(1,+∞) D: (-62,62)
lim[√(x²+x)-√(x²-x)],x→∞
lim[√(x²+x)-√(x²-x)],x→∞
设f(x)=3x,g(x)=x2,则函数g[f(x)]-f[g(x)]=()。
设f(x)=3x,g(x)=x2,则函数g[f(x)]-f[g(x)]=()。
[lncos(x-1)]/[1-sin(πx/2)]x≠1
[lncos(x-1)]/[1-sin(πx/2)]x≠1
怎么证明D(X)=E(X^2)-[E(X)]^2和D(X)=E[X-E(X)]^2
怎么证明D(X)=E(X^2)-[E(X)]^2和D(X)=E[X-E(X)]^2
设f(x)=1/1-x求f[f(x)]和f{f[f(x)]}
设f(x)=1/1-x求f[f(x)]和f{f[f(x)]}
已知列表lst=[ [‘苹果’,’红色’] , [‘葡萄’,’紫色’] , [‘草莓’,’红色’] ],则以下能够获取所有水果名称列表的表达式是: A: [ x[0] for x in lst ] B: [ x[1] for x in lst ] C: [ x(0) for x in lst ] D: [ x for x in lst if x==’水果’]
已知列表lst=[ [‘苹果’,’红色’] , [‘葡萄’,’紫色’] , [‘草莓’,’红色’] ],则以下能够获取所有水果名称列表的表达式是: A: [ x[0] for x in lst ] B: [ x[1] for x in lst ] C: [ x(0) for x in lst ] D: [ x for x in lst if x==’水果’]
【单选题】下面的代码: var person = {fname:"Bill", lname:"Gates", age:62}; var text = ""; for (var x in person) { text += person[x]; } 循环结束后,text的值为:() A. BillGates62 B. Bill C. Gates D. 62
【单选题】下面的代码: var person = {fname:"Bill", lname:"Gates", age:62}; var text = ""; for (var x in person) { text += person[x]; } 循环结束后,text的值为:() A. BillGates62 B. Bill C. Gates D. 62
曲线[img=93x62]17869f180814d49.png[/img]则[img=85x36]17869f181a799ec.png[/img]. ( ) A: 错 B: 对
曲线[img=93x62]17869f180814d49.png[/img]则[img=85x36]17869f181a799ec.png[/img]. ( ) A: 错 B: 对