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{ x|x is an odd natural number, 1≤x≤9}
1 5 1
does 1<X<9 means from 1 to nine?
It means x is greater than or equal to 1, less than or equal to 9. So yes it is the numbers from 1 to 9.
how about set of rainbow colors in rule method?
The set of x|x is the odd numbers....