Determine whether the sequence is arithmetic or geometric. Sequence 1: - 10, 20, - 40, 80, ... Sequence 2: 15, - 5, - 25, - 45, ... Which of the following statements are true regarding Sequence 1 and Sequence 2. Both sequences are geometric. Sequence 2 is arithmetic and Sequence 1 is geometric. Sequence 1 is arithmetic and Sequence 2 is geometric. Both sequences are arithmetic.

Question

Selina Pena

Mathematics

20 April, 12:04

Determine whether the sequence is arithmetic or geometric. Sequence 1: - 10, 20, - 40, 80, ... Sequence 2: 15, - 5, - 25, - 45, ... Which of the following statements are true regarding Sequence 1 and Sequence 2. Both sequences are geometric. Sequence 2 is arithmetic and Sequence 1 is geometric. Sequence 1 is arithmetic and Sequence 2 is geometric. Both sequences are arithmetic.

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Titus Cochran · Answer 1

Arithmetic sequence : this is a sequence where u add the same number to each term to find the next term

geometric sequence : this is a sequence where u multiply by the same number to find the next term

sequence 1: - 10,20,-40,80

u are multiplying each term by - 2 to find the next term ... so this is geometric

sequence 2 : 15,-5,-25,-45

u are adding - 20 to each term to get to the next term ... so this is arithmetic

sequence 1 is geometric and sequence 2 is arithmetic