If you divide by almost zero on the positive side you approach positive infinity.
1/.0001
1/.000001
1/.0000000001
And so on.
If you divide by almost zero on the negative side you approach negative infinity.
Since the left and right side converge to different numbers, you can’t extrapolate this to dividing by exactly zero so it’s undefined.
If they approached the same number you could.
Source: calculus
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