For the point A, we need to note the following pattern:
14=11+3
19=14+5
26=19+7
35=26+9
46=35+11
59=46+13
i.e the pattern to find a number will be to sum to the previous number a certain odd number:
the explicit function is:
[tex]f(n)=f(n-1)+(2n+1)[/tex]
where f(n) represents the nth term and f(n-1) the (n-1)th term.
