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Estudia la posició relativa dels tres plans
open curly brackets table row cell straight pi colon space space begin straight style x plus 4 times y plus 4 times z plus 12 end style equals 0 end cell row cell straight pi apostrophe colon space space begin straight style 6 times x plus 24 times y plus 24 times z plus 72 end style equals 0 end cell row cell straight pi apostrophe apostrophe colon space begin straight style negative 4 times x minus 16 times y minus 16 times z minus 48 end style equals 0 end cell end table close
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