23-03-2018
Mathematics

contestada

the sequence 15,30,45,60 look like 1,2,3,4...except each term is 15 times as large. so, the formula is 15n, where n represents the position of a term in the sequence. check the first four terms

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dannielle dannielle

23-03-2018

15*1=15
15*2=30
15*3=45
15*4=60

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