Roboguru

Jika diketahui  dan , fungsi  adalah ...

Jika diketahui begin mathsize 14px style f open parentheses x close parentheses equals x squared minus 3 x plus 6 end style dan begin mathsize 14px style g open parentheses x close parentheses equals 2 x squared plus 4 x minus 11 end style, fungsi begin mathsize 14px style open parentheses f plus g close parentheses open parentheses x close parentheses end style adalah ...

  1. begin mathsize 14px style 3 x squared minus x minus 5 end style

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

  3. begin mathsize 14px style 3 x squared plus x minus 17 end style

  4. begin mathsize 14px style 3 x squared minus 7 x minus 5 end style

  5. begin mathsize 14px style 3 x squared plus 7 x minus 15 end style

Jawaban:

Perhatikan perhitungan berikut ini.

Ingat, penjumlahan dua fungsi:

begin mathsize 14px style open parentheses f plus g close parentheses open parentheses x close parentheses equals f open parentheses x close parentheses plus g open parentheses x close parentheses end style

Maka:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell left parenthesis f plus g right parenthesis left parenthesis x right parenthesis end cell equals cell f left parenthesis x right parenthesis plus g left parenthesis x right parenthesis end cell row blank equals cell open parentheses x squared minus 3 x plus 6 close parentheses plus open parentheses 2 x squared plus 4 x minus 11 close parentheses end cell row blank equals cell x squared minus 3 x plus 6 plus 2 x squared plus 4 x minus 11 end cell row blank equals cell x squared plus 2 x squared minus 3 x plus 4 x plus 6 minus 11 end cell row blank equals cell 3 x squared plus x minus 5 end cell end table end style

Jadi, fungsi begin mathsize 14px style open parentheses f plus g close parentheses open parentheses x close parentheses end style adalah Error converting from MathML to accessible text..

Dengan demikian, jawaban yang tepat adalah B.

0

Ruangguru

RUANGGURU HQ

Jl. Dr. Saharjo No.161, Manggarai Selatan, Tebet, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12860

Coba GRATIS Aplikasi Ruangguru

Produk Ruangguru

Produk Lainnya

Hubungi Kami

Ikuti Kami

©2021 Ruangguru. All Rights Reserved