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What is the 275th digit after the decimal point in the repeating decimal [tex]$0.\overline{6295}$[/tex]?

A. 0
B. 2
C. 5
D. 6
E. 9


Sagot :

To determine the 275th digit after the decimal point in the repeating decimal [tex]\(0.\overline{6295}\)[/tex], we need to consider the periodic nature of the decimal. The repeating sequence here is "6295", which has a length of 4 digits.

Here is the step-by-step method to find the desired digit:

1. Understand the repeating cycle:
The sequence "6295" repeats indefinitely. This means that every 4 digits, the sequence restarts from the beginning.

2. Determine the effective position within one repeating cycle:
To find which digit corresponds to the 275th position, we need to figure out where the 275th position falls within the cycle of 4 digits. This can be determined by finding the remainder when 274 is divided by 4. We use 274 because the counting starts from 1, so we adjust by subtracting 1 from the desired position.

[tex]\[ \text{Effective position} = (275 - 1) \mod 4 = 274 \mod 4 \][/tex]

3. Calculate the remainder:
When we divide 274 by 4, we get:
[tex]\[ 274 \div 4 = 68 \text{ R } 2 \][/tex]

The remainder is 2, which means the 275th digit is the same as the 2nd digit in the repeating sequence.

4. Identify the digit in the sequence:
The repeating sequence "6295" is indexed as follows:
- 1st digit: 6
- 2nd digit: 2
- 3rd digit: 9
- 4th digit: 5

Therefore, the 2nd digit in this sequence is 9.

Thus, the 275th digit after the decimal point in the repeating decimal [tex]\(0.\overline{6295}\)[/tex] is:

[tex]\[ \boxed{9} \][/tex]

So the correct answer is K.