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Use an alternative method to express the following set: {y:y is a person in your math class and also more than 100 years old.}

User Levininja
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Let's use the letter M to label the math class. The fact that person y is in that class can be expressed by:


y\in M

We also have to show that is older than 100 so we have:


y>100

If we put all this information together we get:


\mleft\lbrace y\colon y\in M,y>100\mright\rbrace

And that's an alternative way to express the set.

User Gohel Kiran
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