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matt grime
matt grime is offline
May8-04, 12:18 PM
Sci Advisor
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P: 9,398
and if x is zero, what then? what are you going to claim 0/|0| is? It is obviously undefined as you've said. thus we cannot use your formula whenever we have a 0/0, and thus you must treat these cases differently. sometimes the function will be differentiable, sometimes not, but just using it as you've written it it is undefined for any function g when g is zero. or are we supposed to do the cancellations, and i think this then gets down to me being a fussy bugger; i like all the details worked out.