Answer :
Answer:
1
Step-by-step explanation:
bcz it have sequence of gap between two digits properly
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Answer:
Sequence (1): 1, 3, 5, 7, 9, ...
Step-by-step explanation:
Let's analyze each sequence to determine which one fits a recognizable pattern:
1. **1, 3, 5, 7, 9, ...**
- This sequence consists of all odd numbers.
- Pattern: a_n = 2n - 1 where 'n' starts from 1.
- For example, a_1 = (2 * 1) - 1 = 1, a_2 = (2 * 2) - 1 = 3, etc.
2. **1, 2, 4, 5, 7, 9, 10, 11, ...**
- This sequence seems to include both odd and even numbers.
- It does not follow a simple arithmetic or geometric pattern.
3. **-1, 1, 7, 10, 20, ...**
- This sequence does not follow a clear arithmetic or geometric pattern on inspection.
4. **1, 7, 10, 20, 25, ...**
- This sequence does not follow a clear arithmetic or geometric pattern on inspection.
Among the given sequences, sequence (1) **1, 3, 5, 7, 9, ...** follows a clear pattern where each term is an odd number starting from 1. The pattern is a_n = 2n - 1