(a)[10]
Fill in the table by stating the next term and the $n$th term for every sequence.
(b(i))[2]
If the sum of the first $n$ terms equals 155, show that $3n^2 + n - 310 = 0$.
(b(ii))[3]
Solve $3n^2 + n - 310 = 0$.
(b(iii))[1]
Complete the statement. The sum of the first ............... terms in this sequence is 155.