作业帮get into trouble一道数学题目额若a²（b-c）+b²（c-a）+c²（a-b）=0,求证：a、b、c三个数中至少有两个数相等
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get into trouble一道数学题目额若a²（b-c）+b²（c-a）+c²（a-b）=0,求证：a、b、c三个数中至少有两个数相等
get into trouble一道数学题目额
若a²（b-c）+b²（c-a）+c²（a-b）=0,求证：a、b、c三个数中至少有两个数相等
get into trouble一道数学题目额若a²（b-c）+b²（c-a）+c²（a-b）=0,求证：a、b、c三个数中至少有两个数相等
a²(b-c)+b²(c-a)+c²(a-b)
=(a²b-b²a)-(a²c-b²c)+c²(a-b)
=ab(a-b)-c(a-b)(a+b)+c²(a-b)
=(a-b)(ab-c(a+b)+c²)
=(a-b)(ab-ac-bc+c²)
=(a-b)(a(b-c)-c(b-c))
=(a-b)(b-c)(a-c)=0
则三个括号至少有一个是0
所以a=b,b=c,c=a至少有一个成立
所以a、b、c三个数中至少有两个数相等
get into trouble=?
Get us into trouble
get into trouble是什么意思?
Get into trouble=?
get into trouble (with)的同义短语
sb get into trouble with sb
get into trouble with的近义词是什么?
get into trouble,表示陷入困境,
i often get into trouble with
某某 get 某某 into trouble的意思
用be in trouble with 和 get ...into trouble 造句
有没有get trouble的说法?be in trouble,get in trouble,get into trouble具体区别加造句!
get into trouble中间能不能加名词比如：this mistake may get her into trouble
get into trouble一道数学题目额若a²（b-c）+b²（c-a）+c²（a-b）=0,求证：a、b、c三个数中至少有两个数相等
get sb in to trouble、get sb into trouble 哪个对?
get sb. in to trouble还是get sb. into trouble指某人陷入困难?
get into trouble 后面怎么+动词,请造句.
get into trouble 的用法最好有例句