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Pertanyaan

Jika begin mathsize 14px style italic x equals minus sign 2 end style, maka nilai dari begin mathsize 14px style open vertical bar fraction numerator 3 italic x squared minus sign 5 italic x minus sign 2 over denominator open vertical bar italic x close vertical bar minus sign 4 end fraction close vertical bar end style adalah ….

  1. 12

  2. 10

  3. 8

  4. 5

  5. 2

A. Rizky

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

Jawaban terverifikasi

Jawaban

jawabannya adalah B.

Pembahasan

Ingat bahwa

begin mathsize 14px style open vertical bar italic x close vertical bar equals open curly brackets table attributes columnalign right end attributes row cell italic x comma end cell cell text jika  end text italic x greater or equal than 0 end cell row cell negative sign italic x comma end cell cell text jika  end text italic x less than 0 end cell end table close end style 

Substitusi undefined ke dalam soal, kita peroleh

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open vertical bar fraction numerator 3 italic x squared minus sign 5 italic x minus sign 2 over denominator open vertical bar italic x close vertical bar minus sign 4 end fraction close vertical bar end cell equals cell open vertical bar fraction numerator 3 open parentheses negative sign 2 close parentheses squared minus sign 5 open parentheses negative sign 2 close parentheses minus sign 2 over denominator open vertical bar negative sign 2 close vertical bar minus sign 4 end fraction close vertical bar end cell row blank equals cell open vertical bar fraction numerator 3 open parentheses 4 close parentheses plus 10 minus sign 2 over denominator 2 minus sign 4 end fraction close vertical bar end cell row blank equals cell open vertical bar fraction numerator 12 plus 10 minus sign 2 over denominator negative sign 2 end fraction close vertical bar end cell row blank equals cell open vertical bar fraction numerator 20 over denominator negative sign 2 end fraction close vertical bar end cell row blank equals cell open vertical bar negative sign 10 close vertical bar end cell row blank equals cell negative sign open parentheses negative sign 10 close parentheses end cell row blank equals 10 end table end style 

Jadi, jawabannya adalah B.

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