11. f(1) = 30, f(n) =2 fn-1) - 50

find the 10th term of the sequence

?

Step-by-step explanation:

example 8th (3) (2) 8-1

(3) (2) 7

3×128 =384

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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