Diberikan f(x)=2x2−x+2 dan g(x)=−x2+2x+1. Rumus fungsi (f−g)(x) adalah ...

Pertanyaan

Diberikan begin mathsize 14px style f left parenthesis x right parenthesis equals 2 x squared minus x plus 2 end style dan begin mathsize 14px style g left parenthesis x right parenthesis equals negative x squared plus 2 x plus 1 end style. Rumus fungsi begin mathsize 14px style left parenthesis f minus g right parenthesis left parenthesis x right parenthesis end style adalah ...

  1. begin mathsize 14px style x squared minus 4 x minus 1 end style

  2. begin mathsize 14px style 3 x squared minus 3 x plus 1 end style

  3. begin mathsize 14px style x squared plus 2 x minus 1 end style

  4. begin mathsize 14px style 3 x squared minus 2 x minus 3 end style

  5. begin mathsize 14px style x squared plus 2 x plus 3 end style

M. Robo

Master Teacher

Jawaban terverifikasi

Jawaban

jawabannya adalah B.

Pembahasan

Ingat kembali bahwa undefined.

Perhatikan bahwa

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell left parenthesis f minus g right parenthesis left parenthesis x right parenthesis end cell equals cell f left parenthesis x right parenthesis minus g left parenthesis x right parenthesis end cell row blank equals cell 2 x squared plus x plus 2 minus space left parenthesis negative x squared plus 2 x plus 1 right parenthesis space end cell row blank equals cell 2 x squared plus x squared minus x minus 2 x plus 2 minus 1 end cell row blank equals cell 3 x squared minus 3 x plus 1 end cell end table end style

Jadi, jawabannya adalah B.

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