若函数$f\left(x\right)=x^3+ax-2$在区间$\left(1,+\infty \right)$内是增函数，则实数$\alpha$的取值范围是

被后世誉为“中国17世纪工艺百科全书”的是（    ）

Mum：Mary. ____

Mary：It's very pretty.

Assistant: ____

Mum：Yes. ____

Assistant：It's $ 99.

Mum：Oh， that's expensive.

Assistant：Do you like that blue skirt？

Mary：Yes. ____ 

Mum：OK. How much is it？

Assistant：It's $ 50.

Mum： ____