The descriptive form A=10, 20, 30...... is A = {x : x is a multiple of 10}
How to write the descriptive form?
The set is given as:
A=10, 20, 30......
Notice that the numbers 10, 20 and 30 are all multiples of 10.
This means that the set A contains the multiples of 10.
Hence, the descriptive form A=10, 20, 30...... is A = {x : x is a multiple of 10}
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