Mathematics for IGCSE & O level - Inequalities (Section 2 - No. 4)
Which of the following is correct?
The solution to the inequality x + 2 < 5 is x < 3.
The solution to the inequality -x > 2 is x > -2.
An inequality with a less than or equal sign is represented by a solid line in the graph.
To solve an inequality, one must isolate the variable on one side.
설명
Statement one is correct, statement two is incorrect because the sign has to change. Statement three is correct, and statement four is correct.