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Diketahui: f ( x ) g ( x ) ​ = = ​ 8 x + 1 x + 3 ​ Tentukan: a . ( f + g ) ( x )

Diketahui:

 

Tentukan:

 

 

  1. ... 

  2. ... 

D. Enty

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Pembahasan

Pembahasan

a. Jadi, .

a.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell f left parenthesis x right parenthesis end cell equals cell 8 x plus 1 end cell row cell g left parenthesis x right parenthesis end cell equals cell x plus 3 end cell end table end style 

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 8 x plus 1 plus x plus 3 end cell row blank equals cell 9 x plus 4 end cell end table end style  

Jadi, table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell begin mathsize 14px style left parenthesis f plus g right parenthesis end style size 14px left parenthesis size 14px x size 14px right parenthesis end cell end table equals table attributes columnalign right center left columnspacing 0px end attributes row blank blank size 14px 9 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank size 14px x end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank size 14px plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank size 14px 4 end table.

 

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Tentukan rumus fungsi ( f + g ) ( x ) , ( f ⋅ g ) ( x ) , ( g f ​ ) ( x ) dan daerah asalnya, jika diketahui f ( x ) dan g ( x ) berikut: f ( x ) = x 2 − 16 ​ dan g ( x ) = 2 x + 6 ​ 1 ​

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