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In an arithmetic sequence, each term after the first is the sum of the term before it plus a constant. In the arithmetic sequence \(a, b, c, d, e,\) each term after the first is the sum of the preceding term and the constant \(k.\) Which of the following is NOT an arithmetic sequence?
A. \(a, b - 1, c - 2, d - 3, e - 4\)
B. \(a - 1, b - 1, c - 1, d- 1, e - 1\)
C. \(a- 1, b - 2, c - 3, d- 4, e - 5\)
D. \(a, 2b, 3c, 4d, 5e\)
E. \(3a, 3b, 3c, 3d, 3e\)
Answer: D
Source: Princeton Review
A. \(a, b - 1, c - 2, d - 3, e - 4\)
B. \(a - 1, b - 1, c - 1, d- 1, e - 1\)
C. \(a- 1, b - 2, c - 3, d- 4, e - 5\)
D. \(a, 2b, 3c, 4d, 5e\)
E. \(3a, 3b, 3c, 3d, 3e\)
Answer: D
Source: Princeton Review
