Hi! I need help with these questions? Thanks!

1.A sequence is ___________

sequence when the first differences are all the same nonzero number.

2.An ordering ofnelements is called _________

of the elements.

3.Find Pk+1 for the given Pk when k = 1 (round to 2 decimal places).

Pk = k/6 (7k + 5 ) please round the answer to 2 decimal places.

4.Find Pk+1 for the given Pk when k = 1 (round to 2 decimal places).

Pk = k2 / 6 ( k + 6)2 (round to 2 decimal places)