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Q.

The range of the function $[4^{x} - 2^{x + 1} + 1]$ is , where $[.]$ represents the greatest integer function is

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a

Whole numbers

b

Even integers

c

Positive integers

d

All integers

answer is B.

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Detailed Solution

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$[{(2^{x})}^{2} - {2.2}^{x} + 1] = [{(2^{x} - 1)}^{2}] \in W$

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