2012 RI H1 Promo Q2
2012 RI H1 Promo Q2
5 marks
Solve the simultaneous equations
\[y = (1 + \mathrm{e}^{x})(1 - \mathrm{e}^{x}),\]
\[x = \ln(y + 1).\][5]
Solution:
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Answer:\(x=0,\quad y=0\)
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