Binomial Expansion for non positive integer of power n (Matriculation Standard),not for SPM students

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In order to do this, you need to understand the basic binomial expansion first.
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In general, for any binomial expansion of (1+ax)ⁿ where n is not a positive integer, the validity range is laxl<1 = -1<ax<1 = -1/a<x<1/a where a is a constant.

claireli
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"X should be in the range of -1 to 1", I think this statement is wrong since its a cube root, not square root, x can be any value

leeterry