Question
Updated on
10 Jan 2018
- Japanese
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English (US)
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Question about English (US)
what is the difference between und.(undefined) and DNE (does not exist) in the math?
what is the difference between und.(undefined) and DNE (does not exist) in the math?
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10 Jan 2018
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- English (US)
A function f is undefined at a if f(a) cannot be found. For example, f(x) = 1/x is undefined at x = 0.
A limit does not exist if the left-side limit (lim x → a−) and the right-side limit (lim x → a+) do not agree. For example, lim f(x) x → 0 does not exist because lim f(x) x → 0− = −∞ and lim f(x) x → 0+ = +∞.
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