What is the common difference between successive terms in the sequence?

0.36, 0.26, 0.16, 0.06, –0.04, –0.14,

a. –0.1

b. –0.01

c. 0.01

d. 0.1

Answer

a. –0.1

Explanation

Common difference is the difference between the successive terms in an arithmetic progression.

Common difference = 0.26 - 0.36

                                 = -0.1

Also it can be found by = -0.14 - -0.04

                                       = -0.1

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

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