Which best describes the relationship between the successive terms in the sequence shown?2.4, –4.8, 9.6, –19.2
Answer
A
The common difference is –7.2.
B
The common difference is –2.4.
C
The common ratio is –2.0.
D
The common ratio is –0.5.
Explanation
Divide each term by the term before it: –4.8 ÷ 2.4 = –2, 9.6 ÷ (–4.8) = –2, and –19.2 ÷ 9.6 = –2. The sequence has a common ratio of –2.0, so choice C is correct.
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