5/ Let f:R - R be defined by f(x) = 2x + x ], then f(2x) + f(-x)-f(x)= (a) 2x (b) 21 x | (c) – 2x (d) -21x|

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( f(x)=2 x+|x| ) ( f(2 x)+f(-x)-f(x) ) ( =|-4 x+2| x|+-2 x+|-x mid ) ( -(-2 x+|x| ) ( 4 x+2|x|-2 x+|-x| ) ( +2 x-|x| ) ( 2 x+2|x|+|-x|-|x| ) ( =quad 4 x|+2| x|+| x|-| x mid ) ( =21 x mid ) Ans Here orth will sepositue ofter I I and equal

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