英數兩全字詞教學
62 條件命題 Conditional
- a particular case 一個特定狀況
- contradictory 矛盾的
- conditional statements 條件命題
- sufficiency 充分性
- necessity 必要性
- hypothesis 假設
- implication symbol \(\Rightarrow\) 雙槓右箭頭
- if P then Q / P implies Q 若 P 則 Q/\(P\Rightarrow Q\)
- P only if Q P 惟若 Q
- P if and only if Q \(P\Leftrightarrow Q\),P 若且惟若 Q
- P is equivalent to Q P 等價於 Q
- sufficient condition 充分條件
- necessary condition 必要條件
- a necessary and sufficient condition 充要條件
- There are infinitely many prime numbers. 質數有無窮多個。