Flashcards
Number Systems
Cards in this deck (13)
- 1What are the Natural numbers?The natural numbers are the positive whole numbers.
{1, 2, 3, ...} - 2What are the Integers?The integers are positive and negative whole numbers including zero.
{... -3, -2, -1, 0, 1, 2, 3, ...} - 3What are the Rational numbers?The rational numbers are numbers that can be written in the form \[\frac{p}{q}\;\;where\;\;p,q \in Z\;\;and\;q \ne 0.\]
[Basically fractions but they include recurring decimals like 0.33333...... etc] - 4What are the Irrational numbers?The irrational numbers are numbers that cannot be written in the form \[\frac{p}{q}\;\;where\;\;p,q \in Z\;\;and\;q \ne 0.\]
\[E.g.\quad \pi \;and\;\sqrt 3 \;etc.\] - 5What are the Real numbers?The real numbers are all rational and irrational numbers together.
- 6What are Complex numbers?Numbers in the form \[a + bi\] where \[a,b \in R\quad and\quad i = \sqrt { - 1} .\]
\[E.g.\quad - 3 + 4i,\quad 8 + 0i,\quad 2 - 5i,\quad etc.\] - 7What is the symbol for the Natural numbers?N
- 8What is the symbol for the Integers?Z
- 9What is the symbol for the Rational numbers?Q
- 10What is the symbol for the Irrational numbers?R\Q
- 11What is the symbol for the Real numbers?R
- 12What is the symbol for the Complex numbers?C
- 13Draw a Venn Diagram to show: Naturals Integers Rationals Irrationals Reals Complex Numbers
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- Leaving Certificate Mathematics Flashcards on Number Systems, created by Ms. S. Sweeny on 29/12/2020.
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- Ms. S. Sweeny
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