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OpenStudy (anonymous):
the expression for the nth term of a series is n(n + 2). Work out the 3rd and 4th terms of this series.
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OpenStudy (anonymous):
3rd term = 15 4th term= 24
OpenStudy (anonymous):
How did you work that out? :)
OpenStudy (anonymous):
substitute 3 and 4 in place of n in each equation
OpenStudy (anonymous):
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