A hotel is built like a pyramid, such that the top
floor has 1 Cextremely luxurious)
floor has 4 more rooms than the one above it.
room,
and
every other
a) write an expression for Rn, the number of
rooms on the nth flour. (Think of the top floor as n=1)
b) If the hotel has 40 floors of
Vooms,
how
many
Vooms
are there in the hotel?