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Chek-hun

Wikipedia (chū-iû ê pek-kho-choân-su) beh kā lí kóng...
f(x) ùi a kaù b ê chek-hun tō sī y = f(x) ham x-te̍k tī [a, b] chit ê hoān-ûi tiong-ng ê bīn-chek S.

bî-chek-hun, 1 ê hâm-sò͘ ê chek-hun (integral) tō sī 1 chióng khah it-poaⁿ-te̍k ê kè-sǹg chóng-ha̍p ê hong-hoat, tiāⁿ ēng tiàm kè-sǹg chit-koá bu̍t-lí sèng-chit, pí-lūn kóng bīn-chek, chit-liōng, thé-chek, téng-téng. Chek-hun ê tēng-gī ū kúi-nā khoán, m̄-koh ta̍k khoán ê pún-chit lóng sio-siâng.