Pertanyaan

Diketahui dan , maka

Diketahui $begin mathsize 14px style straight f open parentheses straight x close parentheses equals fraction numerator straight x minus 1 over denominator straight x plus 1 end fraction comma space straight g open parentheses straight x close parentheses equals straight x squared minus 2 straight x plus 3 end style$ dan begin mathsize 14px style straight h open parentheses straight x close parentheses equals 2 straight x plus 4 end style , maka begin mathsize 14px style open parentheses straight f ring operator straight g ring operator straight h close parentheses open parentheses straight x close parentheses equals... end style

$begin mathsize 14px style fraction numerator 4 straight x squared minus 12 straight x plus 2 over denominator 4 straight x squared plus 12 straight x end fraction end style$
$begin mathsize 14px style fraction numerator 4 straight x squared plus 12 straight x minus 2 over denominator 4 straight x squared plus 12 straight x end fraction end style$
$begin mathsize 14px style fraction numerator 4 straight x squared plus 12 straight x over denominator 4 straight x squared minus 12 straight x minus 2 end fraction end style$
$begin mathsize 14px style fraction numerator 8 straight x squared plus 16 straight x plus 16 over denominator straight x squared plus 2 straight x plus 1 end fraction end style$
$begin mathsize 14px style fraction numerator straight x squared plus 2 straight x plus 2 over denominator straight x squared plus 2 straight x plus 1 end fraction end style$

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$begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell open parentheses straight f ring operator straight g ring operator straight h close parentheses open parentheses straight x close parentheses end cell equals cell straight f open parentheses straight g open parentheses straight h open parentheses straight x close parentheses close parentheses close parentheses end cell row blank equals cell straight f open parentheses straight g open parentheses 2 straight x plus 4 close parentheses close parentheses end cell row blank equals cell straight f open parentheses open parentheses 2 straight x plus 4 close parentheses squared minus 2 open parentheses 2 straight x plus 4 close parentheses plus 3 close parentheses end cell row blank equals cell straight f open parentheses 4 straight x squared plus 16 straight x plus 4 minus 4 straight x minus 8 plus 3 close parentheses end cell row blank equals cell straight f open parentheses 4 straight x squared plus 12 straight x minus 1 close parentheses end cell row blank equals cell fraction numerator open parentheses 4 straight x squared plus 12 straight x minus 1 close parentheses minus 1 over denominator open parentheses 4 straight x squared plus 12 straight x minus 1 close parentheses plus 1 end fraction end cell row blank equals cell fraction numerator 4 straight x squared plus 12 straight x minus 1 minus 1 over denominator 4 straight x squared plus 12 straight x minus 1 plus 1 end fraction end cell row blank equals cell fraction numerator 4 straight x squared plus 12 straight x minus 2 over denominator 4 straight x squared plus 12 straight x end fraction end cell end table end style$

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