Form 1 Mathematics

Question

List all the integer values of x which satisfy the inequalities x+3<5 and 2-3x≤5.

Answer 1

> greater than 大于

例子：x > 1 , x= 2, 3, 4...

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< less than 小于

例子：x < 1 , x= 0, -1, -2...

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≥ greater than or equal to 大于或等于 

例子：x ≥ 1 , x= 1, 2, 3, 4...

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≤ less than or equal to 小于或等于 

例子：x ≤ 1 , x= 1, 0, -1, -2...

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x+3 < 5 and 2-3x ≤ 5

先把 x 做主角。

x+3 < 5 

x < 5-3

x < 2 

.

2-3x ≤ 5

-3x ≤ 5-2

x ≥ 3/-3  

x ≥ -1

除或是乘, 大于/小于方向会改变

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x < 2  

x ≥ -1

x = -1 , 0 , 1 [答案]

Comments

111

Answer 2

Analysis

Test question analysis: inequality x+3 ＜ 5, the solution is: x ＜ 2,

Resolution: ｜ | 3x-2 | ≤ 5, ｜ - 5 ≤ 3x-2 ≤ 5

Comments

这是什么意思？？？