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2.1
The number system and the sets of numbers
2.1.1 The sets of numbers
2.1.2
Fractions
2.1.3
How to read fractions
2.1.4
Decimals
2.1.5 Exponent form
2.2
Mathematical operations, symbolism and set theory language
2.3
Co-ordinate systems, matrices and determinants
2.3.1
Cartesian co-ordinate system
2.3.2
Polar co-ordinate system
2.3.3
Identity matrices
2.3.4
Upper triangular matrices
2.3.5
Lower triangular matrices
2.3.6
Diagonal matrix
2.4
Equations and formulae (singular: formula)
2.4.1
Equations
2.4.1
Formulae
2.4.1
Quadratic equation
2.4.1
Transformation, solution, linearity and degeneracy
2.5
Ratio, proportion and variation
2.6
Exercises
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