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Why is the origin in the solution of \(x+y\leq 1\)?

Answer and explanation

Correct answer: Because \(0\leq 1\)

For the origin, substitute \(x=0\) and \(y=0\). Then \(x+y\leq 1\) becomes \(0+0\leq 1\), i.e., \(0\leq 1\), which is true. Therefore, the origin lies in the solution region of the inequality. \(1\leq 0\) is false and does not result from the substitution. Exam tip: To check whether a point belongs to a solution region, substitute its coordinates in the inequality.

Related tags

Linear InequalitiesOrigin TestGraphical SolutionSolution RegionTwo VariablesGraphical Solution Of Linear Inequalities In Two VariablesMathematicsClass 11 Mcq

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