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已知二次函数f(x)=ax²+4x+3a,且f(1)=0.试判断函数f(x)零点的个数
1年前
两个仿句例句:太阳无语,却放射出光辉;高山无语,却体现出巍峨;大地无语,却展示出广博.仿句:_____,______,_
1年前
英语翻译A few days ago I met someone____brother I went to school
1年前
英语翻译i hope come to universe.i houe to go to the universe
1年前
At last,the little boy went to see a funny film s__ at Hongq
1年前