The range of f(x) = (4x + 2x + 1]; (where :) denotes greatest integer function) is (1) 1* - {1, 2} (2) 1 (3) (4) /

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( 1^{x}+2^{x}+1 ) has a range (1000)( [text { put } x=-infty] ) ( thereforeleft[4^{x}+2^{x}+1right] ) will be ( I^{+} ) ans) ( 4 I^{+} )

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