Write the following sets in the set-builder form :
(i) `{3,6,9,12}`
(ii) `{2,4,8,16,32}`
(iii) `{5,25,125,625}`
(iv) `{2,4,5,….}`
(v) `{1,4,9,….,100}`.

Explanation

To write the given sets in set-builder form, we need to identify a general rule or pattern that describes the elements of each set. Let's go through each set step by step.

### Step-by-Step Solution:

**(i) Set: {3, 6, 9, 12}**

1. **Identify the Pattern**: The numbers are multiples of 3.
2. **General Rule**: We can express this as \( x = 3n \), where \( n \) is a natural number.
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