| 单词 | polynomial |
| 释义 | polynomial A function of the form y = f(x), defined in terms of a sum of terms each of which is a coefficient times a power of x. A linear function is a first-order polynomial, such as y = ax + b. A quadratic is a second-order polynomial, such as y = ax2 + bx + c. A cubic is a third-order polynomial, such as y = ax3 + bx2 + cx + d. In all cases it is assumed that a € 0, though any of the remaining coefficients may be zero. An Nth order polynomial takes the form y = aN xN + aN - 1 xN - 1 + … + a0. An Nth order polynomial can be shown to have N roots, that is N values of x for which y = 0. These roots may be real, imaginary or complex numbers. If the N roots are known, y can be factorized, that is, written as y = aN (x - r1) (x - r2 ) … (x - rN ). Linear and quadratic polynomial equations can be solved analytically by simple formulae. The cubic can in principle be solved analytically, but the procedure is so complicated that numerical methods are normally used instead. For quartics and above numerical methods have to be used to find the roots of polynomial equations. |
| 随便看 |
|
英汉经管词典收录了3426条经济管理类英汉双解词条，基本涵盖了经济学、管理学、金融学、会计学、证券期货、商务活动等领域的常用英语单词及短语词组的翻译及用法，是学习及工作的有利工具。