This animation introduces cubic sequences, where the third row of differences becomes constant. Using a worked example, it shows how to build successive difference rows from a sequence, identify a (first term), d (first difference), c (second difference), and b (third difference), then substitute these into the nth term formula a+d(n-1)+c(n-1)(n-2)/2+b(n-1)(n-2)(n-3)/6. Useful for GCSE and IGCSE students learning to derive and apply formulas for cubic number patterns.
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Explain concept of cubic sequence with example. Use nth term formula: nth term=a+d(n-1)+c(n-1)(n-2)/2+b(n-1)(n-2)(n-3)/6. a=first term, d=first difference, c=second difference, b=third common difference Audience: O level, IGCSE, GCSE, Edexcel maths students