If r ( x ) 3 ( x 2 3 x 4 ) x 2 1 r ( x ) 3 ( x 2 3 x 4 ) x 2 1 , then r ( x ) r ( x ) has a vertical asymptote at

Question

If r ( x )   3 ( x 2 3 x 4 ) x 2 1 r ( x )   3 ( x 2 3 x 4 ) x 2 1 , then r ( x ) r ( x ) has a vertical asymptote at

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If r ( x ) = 3 ( x 2 3 x 4 ) x 2 1 r ( x ) = 3 ( x