
Dal J. answered 03/06/15
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The trick to this is to calculate the difference between the terms, and see what is happening to the differences.
38 - 14 = 24
74 - 38 = 36
122 - 74 = 48
and so on.
When you see the pattern, then apply it to determine how many the NEXT difference will be, and add it to the last term.