Diketahui  dan  . Rumus fungsi (f+g)(x) adalah ....

Pertanyaan

Diketahui begin mathsize 14px style f open parentheses x close parentheses equals 5 x squared plus 2 x minus 13 end style dan size 14px g begin mathsize 14px style left parenthesis x right parenthesis end style size 14px equals size 14px minus size 14px 2 size 14px x to the power of size 14px 2 size 14px plus size 14px 7 size 14px x size 14px plus size 14px 1 . Rumus fungsi begin mathsize 14px style left parenthesis f plus g right parenthesis left parenthesis x right parenthesis end style adalah ....

  1. begin mathsize 14px style 3 x squared plus 9 x plus 12 end style 

  2. begin mathsize 14px style 7 x squared plus 9 x minus 14 end style 

  3. begin mathsize 14px style 3 x squared plus 9 x minus 14 end style 

  4. begin mathsize 14px style 7 x squared plus 9 x minus 12 end style 

  5. begin mathsize 14px style 3 x squared plus 9 x minus 12 end style 

I. Roy

Master Teacher

Mahasiswa/Alumni Universitas Negeri Surabaya

Jawaban terverifikasi

Jawaban

jawabannya adalah E. 

Pembahasan

Ingat kembali bahwa begin mathsize 14px style left parenthesis f plus g right parenthesis left parenthesis x right parenthesis equals f left parenthesis x right parenthesis plus g left parenthesis x right parenthesis end style. Sehingga diperoleh

table attributes columnalign right center left columnspacing 0px end attributes row cell begin mathsize 14px style left parenthesis f plus g right parenthesis end style begin mathsize 14px style left parenthesis x right parenthesis end style end cell size 14px equals cell size 14px f begin mathsize 14px style left parenthesis x right parenthesis end style size 14px plus size 14px g begin mathsize 14px style left parenthesis x right parenthesis end style end cell row blank size 14px equals cell size 14px 5 size 14px x to the power of size 14px 2 size 14px plus size 14px 2 size 14px x size 14px minus size 14px 13 blank size 14px minus size 14px 2 size 14px x to the power of size 14px 2 size 14px plus size 14px 7 size 14px x size 14px plus size 14px 1 end cell row blank size 14px equals cell size 14px 5 size 14px x to the power of size 14px 2 size 14px minus size 14px 2 size 14px x to the power of size 14px 2 size 14px plus size 14px 2 size 14px x size 14px plus size 14px 7 size 14px x size 14px minus size 14px 13 size 14px plus size 14px 1 end cell row blank size 14px equals cell size 14px 3 size 14px x to the power of size 14px 2 size 14px plus size 14px 9 size 14px x size 14px minus size 14px 12 end cell end table

Jadi, jawabannya adalah E. 

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