If a+b=0,then the equation ax+b=0 for x has( )(英汉小词典:infiniteroots:无穷多个根)A. only one rootB. only one root or no rootC. only one root or infinite rootsD. no root or infinite roots
问题描述:
If a+b=0,then the equation ax+b=0 for x has( )(英汉小词典:infiniteroots:无穷多个根)
A. only one root
B. only one root or no root
C. only one root or infinite roots
D. no root or infinite roots
答
知识点:本题考查了一元一次方程的解,读懂题意是解题的关键,注意要分情况讨论求解.
答案解析:分a=0与a≠0两种情况讨论求解即可进行选择.
考试点:一元一次方程的解.
知识点:本题考查了一元一次方程的解,读懂题意是解题的关键,注意要分情况讨论求解.