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ɮպŰҹͧŤ

ɮպŰҹͧŤ ͹ؾѹ Ծѹ 繡ôԹѡŤ鹼ѹѹ ¤ҶҹѧѹͧһԾѹ ǹ͹ؾѹ Ҩѧѹ ɮպ͹ӤѭͧŤʷѺ繷ɮպŰҹͧҢҹ ŵͧӤѭͧɮպ 觺ҧ¡ҷɮպŰҹͧŤʺͧ鹷öӹdzһԾѹҹؾѹ ͧѧѹ

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· ɮպҼͧ¹ŧ 㹻ҳ㹪ǧ (ͻҳ) ¹ŧ

繴¡Ѻͤ Ҩµҧ ͹ҤԹҧ鹵çյ˹觨ҡѧѹ x(t) t ͹ؾѹͧѧѹҡѺ¹ŧҡͧ x ͪǧҷҡ (͹͹ؾѹͧѺ) ҹ¹ŧͧзҧͪǧѵ v ͧ͹Ҥ ѭóͧźԫ

\frac{dx}{dt} = v(t)

ͨѴٻ

dx = v(t)\,dt

ҡáТҧ ¹ŧ x ¡ Δx ͼͧ¹ŧҡ dx ѹѧҡѺͧŤٳҧ͹ؾѹҷҡ ͹ѹͻԾѹ ѧ鹡һԾѹö׹ѧѹ鹢ͧѹҡ͹ؾѹ ǡѹ ôԹù鼡ѹѹ ¤ö͹ؾѹͧšһԾѹ 觨ѧѹѵǤ׹

F(x) = \int_a^x f(t)\,dt + F(a)

f(x) = \frac{d}{dx} \int_a^x f(t)\,dt

th.wikipedia.org/wiki/ɮպŰҹͧŤ

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