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22-06-2017
Mathematics

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can someone plz explain to me when to use an open and closed dot

can someone plz explain to me when to use an open and closed dot class=

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musiclover10045 musiclover10045

22-06-2017

closed dot is if the number is part of the solution so if it is equal to

and

use open if it is not part of solution as in if it is greater than or less than

so for your picture x greater or equal to -2 it would be a closed dot

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