Roboguru

Jika diketahui  dan , maka

Jika diketahui f open parentheses x close parentheses equals 2 x plus 1 dan open parentheses f ring operator g close parentheses open parentheses x close parentheses equals negative 2 x minus 4 x minus 1, maka g open parentheses x close parentheses equals....  

Jawaban:

Diketahui f open parentheses x close parentheses equals 2 x plus 1 dan open parentheses f ring operator g close parentheses open parentheses x close parentheses equals negative 2 x minus 4 x minus 1, maka diasumsikan menjadi:

f open parentheses x close parentheses equals 2 x plus 1 open parentheses f ring operator g close parentheses open parentheses x close parentheses equals negative 2 x squared minus 4 x minus 1  

Sehingga:

space space space space open parentheses f ring operator g close parentheses open parentheses x close parentheses equals negative 2 x squared minus 4 x minus 1 space space space space space space f open parentheses g open parentheses x close parentheses close parentheses equals negative 2 x squared minus 4 x minus 1 2 open parentheses g open parentheses x close parentheses close parentheses plus 1 equals negative 2 x squared minus 4 x minus 1 space space space space space space 2 open parentheses g open parentheses x close parentheses close parentheses equals negative 2 x squared minus 4 x minus 1 minus 1 space space space space space space 2 open parentheses g open parentheses x close parentheses close parentheses equals negative 2 x squared minus 4 x minus 2 space space space space space space space space space space space g open parentheses x close parentheses equals fraction numerator negative 2 x squared minus 4 x minus 2 over denominator 2 end fraction space space space space space space space space space space space g open parentheses x close parentheses equals negative x squared minus 2 x minus 1  

Jadi, nilai g open parentheses x close parentheses equals negative x squared minus 2 x minus 1.

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