Roboguru

Diketahui ,  dan , maka nilai dari

Diketahui begin mathsize 14px style straight f left parenthesis straight x right parenthesis equals straight x plus 2 end stylebegin mathsize 14px style straight g left parenthesis straight x right parenthesis equals 3 straight x minus 4 end style dan begin mathsize 14px style straight h left parenthesis straight x right parenthesis equals 2 straight x minus 3 end style, maka nilai dari Error converting from MathML to accessible text. 

  1. begin mathsize 14px style negative 48 end style 

  2. size 14px minus size 14px 29 

  3. size 14px minus size 14px 57 

  4. size 14px minus size 14px 23 

  5. size 14px minus size 14px 11 

Jawaban:

Dengan menerapkan konsep komposisi tiga fungsi:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell left parenthesis straight f ring operator straight g ring operator straight h right parenthesis left parenthesis straight x right parenthesis end cell equals cell straight f left parenthesis straight g left parenthesis straight h left parenthesis straight x right parenthesis right parenthesis right parenthesis end cell row blank equals cell straight f left parenthesis 3 left parenthesis straight h left parenthesis straight x right parenthesis minus 4 right parenthesis end cell row blank equals cell straight f left parenthesis 3 left parenthesis 2 straight x minus 3 right parenthesis minus 4 right parenthesis end cell row blank equals cell straight f left parenthesis 6 straight x minus 9 minus 4 right parenthesis end cell row blank equals cell straight f left parenthesis 6 straight x minus 13 right parenthesis end cell row blank equals cell left parenthesis 6 straight x minus 13 right parenthesis plus 2 end cell row blank equals cell 6 straight x minus 11 end cell row cell left parenthesis straight f ring operator straight g ring operator straight h right parenthesis left parenthesis negative 3 right parenthesis end cell equals cell 6 times left parenthesis negative 3 right parenthesis minus 11 end cell row blank equals cell negative 18 minus 11 end cell row blank equals cell negative 29 end cell row blank blank blank end table end style 

Jadi, Jika begin mathsize 14px style straight f left parenthesis straight x right parenthesis equals straight x plus 2 end stylebegin mathsize 14px style straight g left parenthesis straight x right parenthesis equals 3 straight x minus 4 end style dan begin mathsize 14px style straight h left parenthesis straight x right parenthesis equals 2 straight x minus 3 end style maka begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell left parenthesis straight f ring operator straight g ring operator straight h right parenthesis left parenthesis negative 3 right parenthesis end cell end table equals table attributes columnalign right center left columnspacing 0px end attributes row blank blank minus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 29 end table end style.

Oleh karena itu, Jawaban yang benar adalah B

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