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Which of the following represents the two's complement of the binary number 1101?

Question

Which of the following represents the two's complement of the binary number 1101?

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Solution

To find the two's complement of the binary number 1101, we can follow these steps:

1. Break Down the Problem

To calculate the two's complement, we need to:

  1. Invert the digits (change 0s to 1s and 1s to 0s).
  2. Add 1 to the inverted binary number.

2. Relevant Concepts

The two's complement is computed as follows:

  • Inversion of bits: If the binary number is represented as bnbn1...b1b0 b_n b_{n-1} ... b_1 b_0 , then the inversion yields bnbn1...b1b0 \overline{b_n} \overline{b_{n-1}} ... \overline{b_1} \overline{b_0} .
  • Adding 1 to the inverted number can be represented mathematically.

3. Analysis and Detail

Let's perform the operations step by step:

  1. Original Binary Number: 1101 1101
  2. Inversion:
    • Change each digit: 10 1 \to 0 and 01 0 \to 1 .
    • Resulting inverted number: 0010 0010
  3. Adding 1:
    • Binary addition of 0010 0010 and 0001 0001 :
        0010
      + 0001
      ------
        0011
      

4. Verify and Summarize

We inversed the original number correctly and added 1 to the inverted binary number resulting in 0011 0011 . Therefore, the two's complement of 1101 1101 is 0011 0011 .

Final Answer

The two's complement of the binary number 1101 1101 is 0011 0011 .

This problem has been solved

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