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D H
#20
Jun23-08, 03:44 PM
Mentor
P: 15,061
Whether you are in a math class or a physics class, saying "1/infinity isn't zero. It's infinitely small..." is not correct. In a math class, "1/infinity" is not defined, end of story. In a physics class, 1/infinity is short for [itex]\lim_{x\to\infty} \frac 1 x[/itex], and this is zero.