Pure Maths | Edexcel A Level

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6 Terms

1
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What mappings are functions?

Many to one AND one to one

2
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What makes a mapping NOT a function?

If the input is joined to ‘many’ in the output (ie. one to many or many to many)

3
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What does ℕ stand for?

Natural numbers (eg positive intergers: 1,2,3,4…)

4
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What does ℤ stand for?

Intergers (whole numbers: 0, +-1, +-2…)

5
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What does ℚ stand for?

Quotients (fractional numbers: 1/2, 1/4, 1/6 etc.)

6
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What does ℝ stand for?

Real numbers (eg. : 0, pi, e, -1/2…)