At what points are the equations y=x2 and y=1/x+2 equal?
Question
Answer:
Try this:1) If y=x² and y=(2x+1)/x, then
[tex]x^2= \frac{2x+1}{x}; \ \ \textless \ =\ \textgreater \ \ x^3-2x-1=0; \ (x \neq 0)[/tex] <=> [tex](x+1)(x^2-x-1)=0; \ (x \neq 0)\ \ \textless \ =\ \textgreater \ \left[\begin{array}{ccc}x=-1\\x= \frac{1+ \sqrt{5} }{2} \\x= \frac{1- \sqrt{5}}{2} \end{array}\right[/tex]
2) after 'x' are found it need to calculate 'y':
Answer: (-1;1), (-0.618;0.382), (1.618;2.618)
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10 months ago
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