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Two's Complement Binary to Decimal conversion

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I need assistance in answering the following question:

What is the decimal value of "01111111111111111101111111111102" (in two's complement)?

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Solution Preview

Consider a binary number consisting of N+1 bits, specified as below:
bN ... b2 b1 b0

It's decimal equivalent (considering it in two's complement representation) would be computed as shown ...

Solution Summary

Solution first considers a binary number consisting of N+1 bits, bN ... b2 b1 b0, and shows how its equivalent decimal value can be computed.