SubArea: Introduction to sequencesLevel: BProject ID: 1003084909Accepted: 1Clonable: 0Easy: 1We were given an oscillating sequence 3, −3, 3, −3, 3… (numbers 3 and −3 alternate regularly). What is the formula for the nth element of the sequence?an=(−1)n+1⋅3, n∈Nan=(−1)n⋅3, n∈Nan=3n, n∈Nan=−3n, n∈N
