\n| $C(t)$<\/td>\n | $ \\nearrow $<\/td>\n | $\\frac{1}{8}$<\/td>\n | $ \\searrow $<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n A concentra\u00e7\u00e3o m\u00e1xima \u00e9 0,125 e ocorre aproximadamente 0,55 ($\\ln \\sqrt 2\u00a0 \\approx 0,35$) minutos ap\u00f3s a subst\u00e2ncia ter sido injetada na corrente sangu\u00ednea.
\n\u00ad<\/li>\n Ap\u00f3s um longo per\u00edodo de tempo, a concentra\u00e7\u00e3o anula-se, pois\u00a0\\[\\begin{array}{*{20}{l}}
\n{\\mathop {\\lim }\\limits_{t \\to\u00a0 + \\infty } C(t)}& = &{\\mathop {\\lim }\\limits_{t \\to\u00a0 + \\infty } \\left[ {\\frac{1}{2}\\left( {{e^{ – 2t}} – {e^{ – 4t}}} \\right)} \\right]} \\\\
\n{}& = &{\\frac{1}{2}\\left( {\\mathop {\\lim }\\limits_{t \\to\u00a0 + \\infty } {e^{ – 2t}} – \\mathop {\\lim }\\limits_{t \\to\u00a0 + \\infty } {e^{ – 4t}}} \\right)} \\\\
\n{}& = &{\\frac{1}{2}\\left( {0 – 0} \\right)} \\\\
\n{}& = &0
\n\\end{array}\\]<\/li>\n<\/ol>\n\u00ad
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