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Let x = 2 be a root of the equation x 2 + px + q = 0 and f(x) –              p 2 x , 0 p 2 x , ) p 2 x ( ) 16 q 8 q px 4 x cos( 1 4 2 2 Then   ) x ( f lim p 2 x   , where [ ·] denotes greatest integer function, is

1. 1
2. 2
3. 0
4. – 1

Correct answer: 0

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