Eric Nicholas K's answer to mint's Junior College 1 H2 Maths Singapore question.

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Eric Nicholas K
Eric Nicholas K's answer
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J
J
4 years ago
Denominator is 1 - x. This implies that x ≠ 1.

So for your signs table, the overall should be undefined for the row where x = 1.

Also, for the rows where you put all 0s, some of the factors do not equal 0 as well.