7.33.3 Can you answer these questions?

7.33.3.1 How to get multiple solutions ranked in order

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=256244

I want to get 10 solutions nearest to 100, however the following code returns too small answers, how can I realize my thought? 
... 
[equation-solving] [order]
 

asked by Levin Koo https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=81851 2 votes

answered by Matthew Heaney https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=8701 0 votes

7.33.3.2 Solving a complicated, non-polynomial dispersion relation

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=256153

I am quite new to Mathematica, so I apologise if the following question is very basic; I can't seem to find an appropriate answer anywhere! 
I am trying to solve a quite complicated dispersion relation ... 
[plotting] [equation-solving] [symbolic]
 

asked by PhysyCola https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=82023 2 votes

7.33.3.3 Perform Apply[] to a sum of objects

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=256096

is there any way to use the Apply[] function to a sum of objects? By this I mean the following. We know that using Apply[] (@@) to an objects gives: 
 f@@{a} 
f[a] 
 
I'... 
[functions]
 

asked by Einj https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=68771 5 votes