You have seen that the total number of lights in a triangular lighting rig is given by t(n) = n2/2 + n/2, while t(n+1) = n2/2 + 3n/2 + 1. if t(n) times t(n+1) = f(n), what is the reduced form of f(n)?

Solve: 25 points find the fifth term of an increasing geometric progression if the first term is equal to 7−3 √5 and each term (starting with the second) is equal to the difference of the term following it and the term preceding it.