Question

Which best describes the relationship between the successive terms in the sequence shown?

2.4, –4.8, 9.6, –19.2

(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.

Answer 1

• (C)The common ratio is –2.0

Explanation:

Given sequence:

• 2.4, –4.8, 9.6, –19.2

This is not AP as the difference in terms is not common

This is GP with the common ratio of -2 as:

• -19.2/9.6 = 9.6/ -4/8 = -4.8/2.4 = -2

Correct choice is (C)