09 mar 2014, 20:18
alguem me pode ajudar a resulver esta equaçao?
60/[5e^(0,09t) -3] = 20
09 mar 2014, 20:50
\(\frac{60}{5e^{0.09t}-3}=20\Leftrightarrow 5e^{0.09t}-3=\frac{60}{20}\Leftrightarrow 5e^{0.09t}=6\Leftrightarrow e^{0.09t}=\frac{6}{5}\Leftrightarrow 0.09t=ln\frac{6}{5}\Leftrightarrow t=\frac{ln(\frac{6}{5})}{0.09}\)
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