Seudónimo Seudónimo

01-12-2015
Mathematics

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Nth term of 7 9 11 13 15

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WorldCitizen WorldCitizen

01-12-2015

the secret formula seems to be: 7 plus 2 plus 2 plus 2...

so 7+2....

but the plus 2 is repeated!

so

7+(2*x)

how many times is it repeated? 7 is the first term, 9 is the second, but it's repeated only once.. so the number of the term -1!

like this:

7+(2*(n-1))

Answer Link

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