Saturday
July 4, 2015

Homework Help: math

Posted by Anonymous on Saturday, May 9, 2009 at 10:02am.

help me with sequences problem.So if the sequence is 2,5,10,17,26
+3 +5 +7 +9 1st difference
+2 +2 +2 2nd difference
then the nth term can be worked out by writing out :
n 1 2 3 4
n squared 1 4 9 16
original sequence 2 5 10 17
nth term= n squared+1

but what about this question:
8, 10, 14, 20, 28
+2 +4 +6 +8
+2 +2 +2

n 1 2 3 4
n squared 1 4 9 16
original sequence 8 10 14 20 the number you have to add to n squared is different every time so does anybody know how too get the nth term for this sequence?

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