1. Write an expression for the nth term of the sequence 4, -4, 8/3, -4/3, ... (A) (-1)^(n+1) 2^(n+1) / (n+1)! (B) (-1)^(n+1) 2^(n+1) / n! (C) (-1)^n 2^n / n! (D) (-1)^n 2^n / (n-1)! (E) None of these
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The first term is 4, which is \( \frac{(-1)^{1+1} 2^{1+1}}{(1+1)!} = \frac{4}{2} = 2 \), so it doesn't match. Show more…
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