| 释义 |
biquadratic, a. and n. Math.|baɪkwəˈdrætɪk|
[f. bi- prefix2 + quadratic: see prec.]
A. adj. Pertaining to the square of a square, or fourth power, of a number.
biquadratic equation: an equation in which the unknown quantity is raised to the fourth power. biquadratic parabola: a curve of the third order, having two infinite legs tending the same way. biquadratic root: the square root of the square root (of a number).
1668Pell in Rigaud Corr. Sci. Men I. 132 The Latin paper concerning biquadratic equations. 1694Phil. Trans. XVIII. 70 By extracting..the Cubick, Biquadratick Roots, etc. of the Terms. 1804Young in Phil. Trans. XCV. 74 Determined by the solution of a biquadratic equation.
B. n.
a. The fourth power of a number.
b. A biquadratic equation.
1661Pell in Rigaud Corr. Sci. Men I. 132 This biquadratic hath not four possible roots. 1727Chambers Cycl., Biquadratick, the next Power above the Cube. 1798Wood in Phil. Trans. LXXXVIII. 369 In cubics and biquadratics, the imaginary roots were found to be of this form, a + √-b2 . 1838Hallam Hist. Lit. I. i. ix. §5 The method of solving biquadratics. |