I couldn't understand decimal expansion in the number system chapter?
The decimal expansion of a number is its representation in base 10.
The decimal expansion of a rational number is either terminating or non-terminating recurring. Also, a number whose decimal expansion is terminating or non-terminating recurring is rational.
The decimal expansion of an rational number is non-terminating non-recurring. Also, a number whose decimal expansion is non-terminating non-recurring is irrational.
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