Find the first four terms of the sequence a_n = (-1)ⁿ⁺²(7n). Determine whether the sequence is arithmetic, and if so, find the common difference d. A) a₁ = -7, a₂ = 14, a₃ = -21, a₄ = 28; not arithmetic B) a₁ = -7, a₂ = 14, a₃ = -21, a₄ = 28; d = 7 C) a₁ = -7, a₂ = 14, a₃ = -21, a₄ = 28; d = -7 D) a₁ = 7, a₂ = -14, a₃ = 21, a₄ = -28; not arithmetic

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The sequence alternates in sign, which means it is not arithmetic because the difference between consecutive terms is not constant.

Find the First Four Terms of the Sequence An =

Find the First Four Terms of the Sequence A_n =