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Symbol Meaning
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≠ Not equal to 6.12 ≠ 6.13
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> Greater than 4.78 > 4.20
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>> Much greater than 840 >> 16
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< Less than 430 < 540
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<< Much less than 0.002 << 46
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³ Greater than or equal to x ³ y is satisfied for y = 3 and x > 3 or x = 3
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£ Less than or equal to x £ y is satisfied for y = 3 and x < 3 or x = 3
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@ Approximately equal to 3.14159 @ 3.14
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S Sum of S(3 + 4 + 8) = 18
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| | Absolute magnitude of |a| = 4, where a = -4 or +4
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\ Therefore x = Ö4 \ x = ± 2
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º By definition
Establishes a relationship between two or more quantities
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a:b Ratio defined by a/b
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a:b = c:d Proportion defined by a/b = c/d
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