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[[Image:Graph of example function.svg|thumb|250px|紅線Âng-soàⁿ sī佇 tī [[Cartesian面-bīn]]ê關數 hâm-sò͘ ''f''. 水平Hoâiⁿ-te̍k (-軸代表input) sī su-ji̍p {{mvar|x}}, jî-chhiáⁿ垂直軸代表 outputti̍t-te̍k tāi-piáu su-chhut ''f''(''x''), só͘-tíí tsi̍tchit tiuⁿ tô͘ 圖kā所有 só͘-ū [[iú-sū-tùi]] (有序對]]) {{math|(''x'', ''f''(''x''))}}包在內 pau tī lāi-té.|替代文字]]
KoanHâm-sò͘ (關函數, Eng-gí: function),<ref>Hàn-jī-khoan mā kiòkok-kok hâmhō-sò͘chò 函數 ([[Hân-kok-gí|Hân]]: {{lang|ko|함수}}, [[Ji̍t-gí|Ji̍t]]: {{lang|ja|函数}}, [[Oa̍t-lâm-gí|Oa̍t]]: {{lang|vi|Hàm số}}), āu-lâi Ji̍t-pún hān-chè hàn-jī sú-iōng, chiah chia̍p-chia̍p iōng {{lang|ja|関数}}.</ref>, ji̍t-pún hàn-jī taⁿ siá-chò koan-sò͘, sī chi̍t thò su-ji̍p kap khó-lêng ê su-chhut ê koan-hē, koh su-ji̍p ū it-tēng ê tùi-ēng su-chhut. Kán-tan ê kí-lē tio̍h pí-lūn jīn-hô si̍t-sò͘ x kap i-ê pêng-hong x2<math>x^2</math> ê koan-hē. Sò͘-ha̍k siōng tiāⁿ ēng "f(x)" lâi piáu-ta̍t koanhâm-sò͘ koan-hē, "x" tāi-piáu su-ji̍p, f sī koan-sò͘, f(x) sī su-chhut.
== Chham-khó ==
* [[lambda hâm-sò͘]]
== Chù-kha ==
<references/>
[[分類:Sò͘-ha̍k]]
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