You can put this solution on YOUR website! Lim 20x-1 divided by 4x+2 where x approaches infinity.
lim[(20x-1)/(4x+2)] = lim(20x/4x) = lim(5) = 5
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I apologize for this process of determining the limit.
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You probably havea diferenct method discribed in your text;
follow that procedure; you will get the same answer.
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Cheers,
Stan H.