数学职专解答题，麻烦用纸张写给我。大神来解答谢谢 两道解答题数学大神来帮我谢谢
\u6570\u5b66\u5927\u795e\u6765\u89e3\u7b54\uff0c\u8c22\u8c22
\u6d1b\u5fc5\u8fbe\u6cd5\u5219
\u98981\uff1a\uff081\uff09\u7531A+B+C=0\uff0c\u4ee3\u5165A\u3001B\uff0c\u53d8\u4e3a(a²+b²-c²)+(-4a²+2b²+3c²)+C=-3a²+3b²+2c²+C=0
C=3a²-3b²-2c²
\uff082\uff09A+B=(a²+b²-c²)+(-4a²+2b²+3c²)=-3a²+3b²+2c²\uff0c\u5c06a=1\uff0cb=-1\uff0cc=3\u4ee3\u5165\uff0c\u8ba1\u7b97\u53ef\u5f97A+B=18
\u98982\uff1a\u7b2c\u4e8c\u961f\u79cd\u6811\u4e3a\uff1a2a+8\uff1b
\u7b2c\u4e09\u961f\u79cd\u6811\u4e3a\uff1a1/2(2a+8)-6=a-2
\u4e09\u961f\u5171\u79cd\u6811\uff1aa+(2a+8)+(a-2)=4a+6
\u5f53a=100\uff0c\u4e09\u961f\u5171\u79cd\u6811\uff1a4*100+6=406
1\0<=x<=2,,-2<x<3
2、IopI=2,sina=-根3/2，cosa=1/2,tana=-根3
一模一样的题。
http://zhidao.baidu.com/question/560209408740051244.html?from=pubpage&msgtype=2
看见这样的题我都是两眼一番晕倒了。。。。
可以
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