What is a quadrilateral that has 2 separate pairs of equal length sides but is NOT a parallelogram ?
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If a = 4 and d = 3,
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Answer: The general equation for the nth term is 3n + 1.
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For 
to be continuous at 
, we need to have
Note that
means that 
, but that 
is *approaching* 5. We're told that for , we have
We can write
and the limit would be
and so is discontinuous.
Note that
We can write
and the limit would be
and so