Answer:
In a 3-bit 1's complement system, the range of values that can be represented is from -3 to +3. The binary code for -3 in this system can be obtained as follows:
Step 1: Convert the decimal value of -3 to its binary equivalent.
-3 in decimal = -0b11 in binary (using two's complement notation)
Step 2: Convert the binary equivalent of -3 to its 1's complement.
To obtain the 1's complement, we simply invert all the bits of the binary number.
-0b11 in 1's complement = -0b00 (since all the bits are inverted)
Therefore, the binary code for -3 in a 3-bit 1's complement system is -0b00.