solving inqualities
-x/2 - 3 <= 3x + 4 or (-5-1)/4 + (1+2x)/6 > -1
x >= 2- or x < 1
then the solution is all real number.
i know how to calcluate it out but i don't understand why the ans is like that.
-why it is all real number?
-what will happen if it is all real number?
thanks for the help.
questions about inequalities(A.Maths)
2007-11-04 9:20 pm
回答 (1)
2007-11-08 4:21 am
✔ 最佳答案
or的意思係指只要一觸及該範圍便是方程的解當一個數大過等如-2或者細過1的時候
即係代表該答案的範圍係所有實數，因為每一個實數都在範圍之內
eg. 2....佢雖然唔喺x<1的範圍，但係佢喺x>=-2範圍之內，即係佢都係其中一個解
eg.-3....佢唔喺x>=-2範圍之內，但係佢喺x<1的圍範之內。
咁即係代表，x>=-2orx<1己經代表所有的实數
收錄日期: 2021-04-29 19:40:36
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