Question

can someone please help me with sequences?
i don't get why there are so many formulas and which one to use at what time

Answer 1

Write them on a piece of paper. That will make your life much easier.

Answer 2

Do you mean sequences, or do you mean series? Show some formulas you need help with.

Answer 3

for each sequence, find an expression for a(little n) and indicate if the sequence is arithmetic, geometric or neither.

a) 4/3, -5/4, 6/5, -7/6…
neither
an=(-1)^(n+1) n+3/n+2

b) 96, 48, 24, 12…
Geometric
an=96(½)^(n-1)

c) 5, 9, 13, 17…
Arithmetic
an=5+(n-1)4
the answers are below the question but i just don't get how to get that

Answer 4

@Herp_Derp so is the \[a _{n}\] for sequence and \[s _{n}\] for series?