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Jika f ( x ) = x 2 1 ​ − x 1 ​ + 3 , maka f ( 2 1 ​ ) adalah….

Jika , maka adalah….

  1. -20

  2. -16

  3. -12

  4. -8

  5. -6

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H. Nufus

Master Teacher

Mahasiswa/Alumni Universitas Negeri Surabaya

Jawaban terverifikasi

Pembahasan

Maka :

f open parentheses x close parentheses equals 1 over x squared minus 1 over x plus 3 equals x to the power of negative 2 end exponent minus x to the power of negative 1 end exponent plus 3

Maka :

table attributes columnalign right center left columnspacing 0px end attributes row cell f apostrophe left parenthesis x right parenthesis end cell equals cell negative 2 x to the power of negative 3 end exponent minus left parenthesis negative 1 right parenthesis x to the power of negative 2 end exponent end cell row blank equals cell negative 2 x to the power of negative 3 end exponent plus x to the power of negative 2 end exponent end cell row cell f apostrophe open parentheses 1 half close parentheses end cell equals cell negative 2 open parentheses 1 half close parentheses to the power of negative 3 end exponent plus open parentheses 1 half close parentheses to the power of negative 2 end exponent end cell row blank equals cell negative 2 left parenthesis 2 right parenthesis cubed plus left parenthesis 2 right parenthesis squared end cell row blank equals cell negative 16 plus 4 end cell row blank equals cell negative 12 end cell end table

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