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Jika titik A(2,-4) direfleksikan terhadap garis y = 3 ​ x + 2 , maka bayangannya adalah ....

Jika titik A(2,-4) direfleksikan terhadap garis , maka bayangannya adalah ....

  1. begin mathsize 14px style A apostrophe open parentheses negative 1 plus 3 square root of 3 comma square root of 3 minus 3 close parentheses end style  

  2. A apostrophe open parentheses negative 1 minus 3 square root of 3 comma square root of 3 minus 1 close parentheses 

  3. begin mathsize 14px style A apostrophe open parentheses negative 1 minus 3 square root of 3 comma negative square root of 3 plus 5 close parentheses end style 

  4. begin mathsize 14px style A apostrophe open parentheses negative 1 plus 3 square root of 3 comma square root of 3 plus 1 close parentheses end style 

  5. begin mathsize 14px style A apostrophe open parentheses 1 minus 3 square root of 3 comma square root of 3 minus 1 close parentheses end style 

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D. Riansyah

Master Teacher

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bayangannya adalah .

bayangannya adalah  A apostrophe open parentheses negative 1 minus 3 square root of 3 comma square root of 3 minus 1 close parentheses.

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Pembahasan

Perhatikan bahwa nilai m pada persamaan garis , maka Sehingga matriks refleksi terhadap garis adalah Maka, bayangan titik A(2,-4) jika direfleksikan terhadap garis adalah Jadi, bayangannya adalah .

Perhatikan bahwa nilai m pada persamaan garis begin mathsize 14px style y equals square root of 3 x plus 2 end style, maka

undefined

Sehingga matriks refleksi terhadap garis undefined adalah

table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses table row cell cos invisible function application 2 theta end cell cell sin invisible function application 2 theta end cell row cell sin invisible function application 2 theta end cell cell negative cos invisible function application 2 theta end cell end table close parentheses end cell equals cell open parentheses table row cell cos invisible function application 2 open parentheses 60 degree close parentheses end cell cell sin invisible function application 2 open parentheses 60 degree close parentheses end cell row cell sin invisible function application 2 open parentheses 60 degree close parentheses end cell cell negative cos invisible function application 2 open parentheses 60 degree close parentheses end cell end table close parentheses end cell row blank equals cell open parentheses table row cell cos invisible function application 120 degree end cell cell sin invisible function application 120 degree end cell row cell sin invisible function application 120 degree end cell cell negative cos invisible function application 120 degree end cell end table close parentheses end cell row blank equals cell open parentheses table row cell negative 1 half end cell cell 1 half square root of 3 end cell row cell 1 half square root of 3 end cell cell 1 half end cell end table close parentheses end cell end table

Maka, bayangan titik A(2,-4) jika direfleksikan terhadap garis begin mathsize 14px style y equals square root of 3 x plus 2 end style adalah

table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses table row cell x to the power of apostrophe end cell row cell y to the power of apostrophe end cell end table close parentheses open parentheses table row cell negative 1 half end cell cell 1 half square root of 3 end cell row cell 1 half square root of 3 end cell cell 1 half end cell end table close parentheses open parentheses table row 2 row cell negative 4 minus 2 end cell end table close parentheses plus open parentheses table row 0 row 2 end table close parentheses end cell row blank equals cell open parentheses table row cell negative 1 half end cell cell 1 half square root of 3 end cell row cell 1 half square root of 3 end cell cell 1 half end cell end table close parentheses open parentheses table row 2 row cell negative 6 end cell end table close parentheses plus open parentheses table row 0 row 2 end table close parentheses end cell row blank equals cell open parentheses table row cell open parentheses negative 1 half close parentheses open parentheses 2 close parentheses plus open parentheses 1 half square root of 3 close parentheses open parentheses negative 6 close parentheses end cell row cell open parentheses 1 half square root of 3 close parentheses open parentheses 2 close parentheses plus open parentheses 1 half close parentheses open parentheses negative 6 close parentheses end cell end table close parentheses plus open parentheses table row 0 row 2 end table close parentheses end cell row blank equals cell open parentheses table row cell negative 1 minus 3 square root of 3 plus 0 end cell row cell square root of 3 minus 3 plus 2 end cell end table close parentheses end cell row blank equals cell open parentheses table row cell negative 1 minus 3 square root of 3 end cell row cell square root of 3 minus 1 end cell end table close parentheses end cell end table

Jadi, bayangannya adalah  A apostrophe open parentheses negative 1 minus 3 square root of 3 comma square root of 3 minus 1 close parentheses.

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