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Oneill
15 February, 18:27
Is 4,7,9,12 an arithmetic sequence?
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Shepard
15 February, 20:57
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NO
Step-by-step explanation:
If a₁, a₂, a₃, a₄, a₅, ... make an arithmetic sequence, then
aₙ - aₙ₋₁ = a₅ - a₄ = a₄ - a₃ = a₃ - a₂ = a₂ - a₁ = d (common difference)
7 - 4 = 3
9 - 7 = 2
different differences
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Halle Schwartz
15 February, 21:43
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No. The differences between two elements should be same. For example 4-7-10-13 is a arithmetic sequence.
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