Roboguru

Fungsi  dinyatakan dengan rumus , jika  dan  . Tentukan : c. nilai

Pertanyaan

Fungsi begin mathsize 14px style f end style dinyatakan dengan rumus begin mathsize 14px style f left parenthesis x right parenthesis equals a x plus b end style, jika begin mathsize 14px style f left parenthesis 2 right parenthesis equals 13 end style dan begin mathsize 14px style f left parenthesis 5 right parenthesis equals 22 end style .

Tentukan :

c. nilai begin mathsize 14px style f left parenthesis 10 right parenthesis end style

Pembahasan Soal:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank f end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses x close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank a end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank x end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank b end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank f end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses 2 close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 2 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank a end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank b end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 13 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank f end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses 5 close parentheses end cell end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 5 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank a end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank b end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 22 end table end style    

Eliminasi kedua persamaan di atas.

table row cell size 14px 2 size 14px a size 14px plus size 14px b size 14px equals size 14px 13 end cell row cell size 14px 5 size 14px a size 14px plus size 14px b size 14px equals size 14px 22 size 14px space size 14px space size 14px space size 14px minus end cell row cell size 14px minus size 14px 3 size 14px a size 14px equals size 14px minus size 14px 9 end cell end table size 14px a size 14px equals size 14px 3   

Tentukan nilai undefined sebagai berikut.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell 2 a plus b end cell equals 13 row blank rightwards double arrow cell 2 open parentheses 3 close parentheses plus b equals 13 end cell row blank rightwards double arrow cell 6 plus b equals 13 end cell row blank rightwards double arrow cell b equals 7 end cell end table end style 

Sehingga,  begin mathsize 14px style f open parentheses x close parentheses equals 3 x plus 7 end style maka:

begin mathsize 14px style f open parentheses 10 close parentheses equals 3 open parentheses 10 close parentheses plus 7 equals 37 end style 

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 02 Maret 2021

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