Who is good at Maths?Come in!(1)若不等式(a+2)X>a+2的解集为X2,则m的取值范围是?(3)已知方程组x+2y=3和2x+ay=b,当等a于多少,b等于多少时,方程有无数解.请把解题过程写出来,小弟必定感激不尽.
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![Who is good at Maths?Come in!(1)若不等式(a+2)X>a+2的解集为X2,则m的取值范围是?(3)已知方程组x+2y=3和2x+ay=b,当等a于多少,b等于多少时,方程有无数解.请把解题过程写出来,小弟必定感激不尽.](/uploads/image/z/13449407-23-7.jpg?t=Who+is+good+at+Maths%3FCome+in%21%EF%BC%881%EF%BC%89%E8%8B%A5%E4%B8%8D%E7%AD%89%E5%BC%8F%28a%2B2%29X%3Ea%2B2%E7%9A%84%E8%A7%A3%E9%9B%86%E4%B8%BAX2%2C%E5%88%99m%E7%9A%84%E5%8F%96%E5%80%BC%E8%8C%83%E5%9B%B4%E6%98%AF%3F%283%29%E5%B7%B2%E7%9F%A5%E6%96%B9%E7%A8%8B%E7%BB%84x%2B2y%3D3%E5%92%8C2x%2Bay%3Db%2C%E5%BD%93%E7%AD%89a%E4%BA%8E%E5%A4%9A%E5%B0%91%2Cb%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91%E6%97%B6%2C%E6%96%B9%E7%A8%8B%E6%9C%89%E6%97%A0%E6%95%B0%E8%A7%A3%EF%BC%8E%E8%AF%B7%E6%8A%8A%E8%A7%A3%E9%A2%98%E8%BF%87%E7%A8%8B%E5%86%99%E5%87%BA%E6%9D%A5%2C%E5%B0%8F%E5%BC%9F%E5%BF%85%E5%AE%9A%E6%84%9F%E6%BF%80%E4%B8%8D%E5%B0%BD%EF%BC%8E)
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Who is good at Maths?Come in!(1)若不等式(a+2)X>a+2的解集为X2,则m的取值范围是?(3)已知方程组x+2y=3和2x+ay=b,当等a于多少,b等于多少时,方程有无数解.请把解题过程写出来,小弟必定感激不尽.
Who is good at Maths?Come in!
(1)若不等式(a+2)X>a+2的解集为X2,则m的取值范围是?
(3)已知方程组x+2y=3和2x+ay=b,当等a于多少,b等于多少时,方程有无数解.
请把解题过程写出来,小弟必定感激不尽.
Who is good at Maths?Come in!(1)若不等式(a+2)X>a+2的解集为X2,则m的取值范围是?(3)已知方程组x+2y=3和2x+ay=b,当等a于多少,b等于多少时,方程有无数解.请把解题过程写出来,小弟必定感激不尽.
1.把左边展开,合并同类项提出a
2.左边解出x>2,所以m+1
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