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Pertanyaan

Jika begin mathsize 14px style a with rightwards arrow on top equals open parentheses table row 4 row cell negative 9 end cell end table close parentheses end style dan begin mathsize 14px style b with rightwards arrow on top equals open parentheses table row cell negative 1 end cell row 5 end table close parentheses end style, hitunglah nilai dari begin mathsize 14px style open vertical bar a with rightwards arrow on top plus 2 b with rightwards arrow on top close vertical bar end style!

R. Hajrianti

Master Teacher

Mahasiswa/Alumni Universitas Pendidikan Indonesia

Jawaban terverifikasi

Jawaban

 begin mathsize 14px style open vertical bar a with rightwards arrow on top plus 2 b with rightwards arrow on top close vertical bar equals square root of 5 end style.

Pembahasan

Diketahui begin mathsize 14px style a with rightwards arrow on top equals open parentheses table row 4 row cell negative 9 end cell end table close parentheses end style dan begin mathsize 14px style b with rightwards arrow on top equals open parentheses table row cell negative 1 end cell row 5 end table close parentheses end style maka diperoleh begin mathsize 14px style a with rightwards arrow on top plus 2 b with rightwards arrow on top end style sebagai berikut.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell a with rightwards arrow on top plus 2 b with rightwards arrow on top end cell equals cell open parentheses table row 4 row cell negative 9 end cell end table close parentheses plus 2 open parentheses table row cell negative 1 end cell row 5 end table close parentheses end cell row blank equals cell open parentheses table row 4 row cell negative 9 end cell end table close parentheses plus open parentheses table row cell 2 cross times open parentheses negative 1 close parentheses end cell row cell 2 cross times 5 end cell end table close parentheses end cell row blank equals cell open parentheses table row 4 row cell negative 9 end cell end table close parentheses plus open parentheses table row cell negative 2 end cell row 10 end table close parentheses end cell row blank equals cell open parentheses table row cell 4 plus open parentheses negative 2 close parentheses end cell row cell negative 9 plus 10 end cell end table close parentheses end cell row blank equals cell open parentheses table row 2 row 1 end table close parentheses end cell end table end style

Selanjutnya, diperoleh begin mathsize 14px style open vertical bar a with rightwards arrow on top plus 2 b with rightwards arrow on top close vertical bar end style sebagai berikut.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open vertical bar a with rightwards arrow on top plus 2 b with rightwards arrow on top close vertical bar end cell equals cell square root of 2 squared plus 1 squared end root end cell row blank equals cell square root of 4 plus 1 end root end cell row blank equals cell square root of 5 end cell end table end style


Jadi, begin mathsize 14px style open vertical bar a with rightwards arrow on top plus 2 b with rightwards arrow on top close vertical bar equals square root of 5 end style.

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