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Infinitesimal and infinity

2022-04-21 14:05:00 【Don't play nano】

Infinitesimal definition

towards 0 Approaching is called infinitesimal

Infinitesimal plus / reduce / Multiply infinitesimal is still infinitesimal . And infinitesimal ÷ There are many cases of infinitesimal

Theorem 1

An infinitesimal × Bounded as infinitesimal ( important , I often encounter in exams , It's usually a trigonometric function )

Example

Theorem 2

Not usually used , Just a general understanding

Definition of infinity

Approaching positive infinity and negative infinity is called infinity

1. infinity × Infinity is infinity 2. infinity + Bounded is infinite 3. It's just infinite + Negative infinity may be a constant , Negative infinity or positive infinity 4. It's just infinite ÷ It's just infinite / Negative infinity ÷ Negative infinite uncertainty