Sector Fourteen

14.01 - return x * (x + 1) / 2;

14.02 - return (x * ((x*x) + 1)) / 2;

14.03 - i don't know

14.04 - i have no idea

14.05 - using System;

using System.Linq;

public class Program {

    public static int Puzzle(int[] list) {

        return list.Distinct().Count();

    }

}

14.06 - using System;

using System.Linq;

public class Program {

    public static int[] Puzzle(int[] list) {

        return list.Distinct().ToArray();

    }

}

14.07 - using System;

using System.Linq;

public class Program {

    public static bool Puzzle(string s) {

char[] arr = s.ToCharArray();

Array.Reverse(arr);

string r = new string(arr);

return s==r;

      

    }

}

14.08 - char[] arr = a.ToCharArray();

Array.Reverse(arr);

string r = new string(arr);

if(a == b || r == b){

return true;

}

return false;

14.09 - if(yintercept1==yintercept2 && slope1==slope2){

return "same line";

}

if(slope1==slope2){

return "parallel lines";

}

float yint1 = yintercept1;

float yint2 = yintercept2;

float x = 0;

float y = 0;

float slope3 = 0;

float yint3 = 0;

string r = "";

slope3 = slope1 - slope2;

yint3  = yint1 - yint2;

x = (yint3 * -1) / slope3;

y = (slope1 * x) + yint1;

r = "(" + x + ", " + y +")";

return r;