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Rumus fungsi A ke B adalah ....

Rumus fungsi A ke B adalah ....undefined 


  1. begin mathsize 14px style f open parentheses x close parentheses equals x minus 1 end style 

  2. begin mathsize 14px style f open parentheses x close parentheses equals 2 x minus 1 end style 

  3. begin mathsize 14px style f open parentheses x close parentheses equals 2 x end style 

  4. begin mathsize 14px style f open parentheses x close parentheses equals x minus 2 end style 

  5. begin mathsize 14px style f open parentheses x close parentheses equals 2 x minus 2 end style 

Jawaban:

Subtitusikan sembarang anggota fungsi A dan B. Misalkan fungsi A ke B adalah 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 left parenthesis x right parenthesis 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 end style 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell f open parentheses x close parentheses end cell equals cell a x plus b end cell row blank blank cell open parentheses 2 comma 3 close parentheses end cell row cell f open parentheses 2 close parentheses end cell equals cell 2 a plus b end cell row 3 equals cell 2 a plus b... open parentheses 1 close parentheses end cell row blank blank blank row blank blank cell open parentheses 3 comma 5 close parentheses end cell row cell f open parentheses 3 close parentheses end cell equals cell 3 a plus b end cell row 5 equals cell 3 a plus b... open parentheses 2 close parentheses end cell row blank blank blank row blank blank blank row blank blank blank row blank blank blank end table end style 

Eliminasi dan subtitusi persamaan (1) dan (2)

begin mathsize 14px style table row cell 3 equals 2 a plus b end cell row cell 5 equals 3 a plus b end cell row cell negative 2 equals negative a end cell row cell a equals 2 end cell end table minus end style 
 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row 3 equals cell 2 a plus b end cell row 3 equals cell 2 open parentheses 2 close parentheses plus b end cell row 3 equals cell 4 plus b end cell row cell negative 1 end cell equals b row b equals cell negative 1 end cell end table end style

begin mathsize 14px style f open parentheses x close parentheses equals a x plus b f open parentheses x close parentheses equals 2 x plus open parentheses negative 1 close parentheses f open parentheses x close parentheses equals 2 x minus 1 end style 

Jadi, jawaban yang tepat adalah B.

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