quadratic
英 [kw?'dr?t?k]
美 [kwɑ'dr?t?k]
助記提示
1. so called because they involve the square of x.
2. 由正方形面積所表示的平方而引申出的這個含義。
中文詞源
quadratic 四倍的，平方的quadr-,四，-atic,形容詞后綴。用于數學名詞平方。
英文詞源
- quadratic (adj.)
- 1650s, "square," with -ic + obsolete quadrate "a square; a group of four things" (late 14c.), from Latin quadratum, noun use of neuter adjective quadratus "square, squared," past participle of quadrare "to square, set in order, complete" (see quadrant). Quadratic equations (1660s) so called because they involve the square of x.
雙語例句
- 1. Every function whose derivative is linear is a quadratic function.
- 任意一個導數為線性函數的函數都是二次函數.
來自辭典例句
- 2. This is usually a much stronger requirement than quadratic integrability.
- 這通常是一個比平方可積更強的要求.
來自辭典例句
- 3. The quadratic aperture of the cat's - eye diaphragm is imaged too large.
- 貓眼光欄的方形光孔成象太大.
來自辭典例句
- 4. Some quadratic equations have no real roots.
- 某些二次方程沒有實數根.
來自辭典例句
- 5. Their difference is a quadratic residue of 17.
- 它們的差是17的平方剩余.
來自辭典例句