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Diketahui dan , maka adalah ....

Diketahui begin mathsize 14px style f open parentheses x close parentheses equals x plus 1 comma space g open parentheses x close parentheses equals 2 x comma end style dan begin mathsize 14px style h open parentheses x close parentheses equals x squared end style, maka begin mathsize 14px style open curly brackets h ring operator open parentheses g ring operator f close parentheses open parentheses x close parentheses close curly brackets end style adalah .... 

  1. begin mathsize 14px style 2 x squared plus 4 x plus 5 end style

  2. begin mathsize 14px style 3 x squared plus 5 x plus 8 end style

  3. begin mathsize 14px style 4 x squared plus 8 x plus 4 end style 

  4. begin mathsize 14px style 5 x squared plus 8 x plus 4 end style 

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

Jawaban:

Fungsi begin mathsize 14px style open curly brackets h ring operator open parentheses g ring operator f close parentheses open parentheses x close parentheses close curly brackets end style didapatkan:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open curly brackets h ring operator open parentheses g ring operator f close parentheses open parentheses x close parentheses close curly brackets end cell equals cell open curly brackets h open parentheses g open parentheses f open parentheses x close parentheses close parentheses close parentheses close curly brackets end cell row blank equals cell open curly brackets h open parentheses g open parentheses x plus 1 close parentheses close parentheses close curly brackets end cell row blank equals cell open curly brackets h open parentheses 2 open parentheses x plus 1 close parentheses close parentheses close curly brackets end cell row blank equals cell open curly brackets h open parentheses 2 x plus 2 close parentheses close curly brackets end cell row blank equals cell open parentheses 2 x plus 2 close parentheses squared end cell row blank equals cell 4 x squared plus 8 x plus 4 end cell end table end style 

Dengan demikian, begin mathsize 14px style open curly brackets h ring operator open parentheses g ring operator f close parentheses open parentheses x close parentheses close curly brackets end style adalah begin mathsize 14px style 4 x squared plus 8 x plus 4 end style.

Oleh karena itu, jawaban yang benar adalah C.

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