Sequences and Series Question
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Grade 9 Sequences and Series CCSS: HSF-BF.A.2
Which of the following is the explicit formula for the arithmetic sequence -1, 1, 3, 5, ... ?
- an=-1+(n-1)⋅2
- an=-1⋅(2)n-1
- a1=-1;an=an-1+2
- an=2+(n-1)⋅(-1)