Consider the sequence an=(−1)n⋅5a_n = (-1)^n \cdot 5an=(−1)n⋅5. Which statement is true?
It is an arithmetic sequence with d=0d=0d=0
It is an arithmetic sequence with d=−10d=-10d=−10
It is an arithmetic sequence with d=10d=10d=10
It is not an arithmetic sequence