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phospho
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http://www.examsolutions.net/maths-revision/core-maths/sequences-series/binomial/formula/validity/tutorial-1.php
On the above video, he states that the binomial expansion is only valid for |a| < 1 when n is not a positive integer. I understand that when n is not a positive integer the expansion will be infinite as no coefficient will ever be 0, however I don't understand why |a|< 1 ? What if a was 2, the expansion would still be valid no?
On the above video, he states that the binomial expansion is only valid for |a| < 1 when n is not a positive integer. I understand that when n is not a positive integer the expansion will be infinite as no coefficient will ever be 0, however I don't understand why |a|< 1 ? What if a was 2, the expansion would still be valid no?
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