"Hâm-sò͘" pán-pún chi-kan bô-kāng--ê tē-hng
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Tē 1 chōa:
[[Image:Graph of example function.svg|thumb|250px|紅線sī佇[[Cartesian面]]ê關數''f''. 水平軸代表input {{mvar|x}}, jî-chhiáⁿ垂直軸代表 output ''f''(''x''), só͘-tí tsi̍t 圖kā所有 [[有序對]] {{math|(''x'', ''f''(''x''))}}包在內.]]
'''Koan-sò͘''' (關數, [[Eng-gí]]: ''function''), mā kiò '''hâm-sò͘''' (函-), 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 ''x''<sup>2</sup> ê koan-hē. Sò͘-ha̍k siōng tiān ēng "f(x)" lâi piáu-ta̍t koan-sò͘ koan-hē, "x" tāi-piáu su-ji̍p, f sī koan-sò͘, f(x) sī su-chhut.
[[分類:Sò͘-ha̍k]]
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