Mathematics for IGCSE & O level - Sequences (Section 4 - No. 7)
Which of the following sequences is an example of a quadratic sequence?
1, 3, 5, 7,...
2, 4, 6, 8,...
1, 4, 9, 16,...
3, 6, 12, 24,...
Explanation
A quadratic sequence has a second common difference.
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