{"schema_version":"ocme-site-results-v1","locale":"zh-Hant","page_type":"derivations","facts":{"questions":36000,"reviewed":36000,"display_candidates":0,"knowledge":302,"guides":299,"paths":59,"batches":360,"families":1441,"atlas":302,"core":80,"evidence":9,"formal_evidence":5,"formal_subjects":4,"lean_files":6,"lean_toolchain":"leanprover/lean4:v4.30.0","question_state":"candidate","english_state":"ai_candidate","question_Lean":"NOT_RUN","canonical_truth_promotion":false},"filters":{"q":"mko-domain-codomain-range"},"kind":"guides","total":1,"pages":1,"page":1,"entries":[{"id":"derivation-mko-domain-codomain-range-01","title":{"zh-Hant":"定義域、陪域與值域：有限表格與 h(x)=x²+1 的值域","en":"Domain, codomain and range: a finite table and the range of h(x)=x²+1"},"summary":{"zh-Hant":"(1) 設 A={−1,0,1,2}、B={0,1,2,3,4,5}、f(x)=x²+1：驗證 f:A→B 是總函數，求值域 f[A]，並說明 f[A]⊆B 但 f[A]≠B；(2) 說明輸出落在宣告陪域外或漏掉輸入的資料不是本條目的總函數；(3) 對 h:ℝ→ℝ、h(x)=x²+1，證明值域是 [1,∞)，不等於陪域 ℝ。","en":"(1) With A={−1,0,1,2}, B={0,1,2,3,4,5} and f(x)=x²+1: verify that f:A→B is a total function, find the range f[A], and show f[A]⊆B but f[A]≠B; (2) explain why data with an output outside the declared codomain, or with a missing input, is not a total function in the sense of this entry; (3) for h:ℝ→ℝ, h(x)=x²+1, prove that the range is [1,∞), which differs from the codomain ℝ."},"mko_ids":["mko-domain-codomain-range"]}],"title":"概念推導導讀"}