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Author:
Journal / Book Title:
Year:
Volume:
Issue:
zhong kao zhong de zheng shi yun suan
Author(s):
HU Hongling
Pages:
26
-
28
Year:
2006
Issue:
12
Journal:
School Journal of Mathematics
Keyword:
多项式
;
单项式
;
解析
;
合并同类项
;
原式
;
代数式
;
整式运算
;
行计算
;
完全平方式
;
化简
;
Abstract:
<正>一、整式的概念例1 (2006年·成都市)已知代数式x
a-1
y
3
与-3x
-b
y
2a+b
是同类项,那么a、b的值分别是( ).A.a=2,b=-1 B.a=2,b=1 C.a=-2,b=-1 D.a=-2,b=1解析:解决此类问题的关键是明确同类项的定义.同类项所含字母要相同.相同字母的指数相同,要注意的是同类项与系数没有关系.本题选A.
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