Question 1

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Estudia la posició relativa de les rectes:
r colon open curly brackets table row cell begin straight style 9 end style plus left parenthesis begin straight style 1 end style right parenthesis lambda end cell row cell begin straight style 4 end style plus left parenthesis begin straight style 5 end style right parenthesis lambda end cell row cell begin straight style 3 end style plus left parenthesis begin straight style 8 end style right parenthesis lambda end cell end table close space space space space space space s colon open curly brackets table row cell begin straight style negative 4 end style plus left parenthesis begin straight style 6 end style right parenthesis mu end cell row cell begin straight style 7 end style plus left parenthesis begin straight style negative 2 end style right parenthesis mu end cell row cell begin straight style negative 9 end style plus left parenthesis begin straight style negative 7 end style right parenthesis mu end cell end table close

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