2.19.3 Can you answer these questions?

2.19.3.1 How to write this piece of code without AppendTo

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=226081

I am trying to fill a vector starting from component 11 from another vector, I use this code:

Do[AppendTo[xp, x[[i + 10]]], {i, 1, 99982}]

How can I fill xp without using ‘AppendTo’?

asked by mattiav27 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=8822 1 vote

2.19.3.2 Solving a cubic equation in mathematica

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=226231

I am trying to solve a cubic equation using Mathematica of a rather complicated expression say \(f(r,\beta ,\theta )\) , and in terms of \(r\) the maximum degree term that appears is of degree \(3\) so I ...

asked by Wubba lubba dub dub https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=70072 1 vote

2.19.3.3 Using Select for lattice points

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=226130

I know how to use Select to generate a list of numbers which satisfy a certain condition. However, I am not sure how to do this for points (specifically 2-tuples) rather than numbers. What I am trying ...

asked by Descartes Before the Horse https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=69355 1 vote