Gate2017 cs Q23

23The n-bit fixed-point representation of an unsigned real number real X uses f bits for the fraction part. Let The range of decimal values for X in this representation is

Option : D
Explanation :
I=n-f.f
Max value 111.....1 i times .111........1 (f times)

= 2^-i - 2^f
∴ 0 to (2ⁱ - 2^-f)

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