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Pertanyaan

Jika f ( x ) = 2 x maka ....

Jika   maka f open parentheses p minus 2 q plus 3 r close parentheses equals   ....

  1. f open parentheses p close parentheses minus f open parentheses 2 q close parentheses plus f open parentheses 3 r close parentheses 

  2. f open parentheses p close parentheses minus 2 f open parentheses q close parentheses plus 3 f open parentheses r close parentheses 

  3. fraction numerator f open parentheses p close parentheses bullet open parentheses f open parentheses q close parentheses close parentheses squared over denominator open parentheses f open parentheses r close parentheses close parentheses cubed end fraction 

  4. fraction numerator f open parentheses p close parentheses bullet open parentheses f open parentheses q close parentheses close parentheses cubed over denominator open parentheses f open parentheses r close parentheses close parentheses squared end fraction 

  5. fraction numerator f open parentheses p close parentheses bullet open parentheses f open parentheses r close parentheses close parentheses cubed over denominator open parentheses f open parentheses q close parentheses close parentheses squared end fraction  

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M. Robo

Master Teacher

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Pembahasan

Diketahui , maka Perhatikan bahwa , sehingga

Diketahui undefined  , maka

f open parentheses p minus 2 q plus 3 r close parentheses equals 2 to the power of p minus 2 q plus 3 r end exponent f open parentheses p minus 2 q plus 3 r close parentheses equals 2 to the power of p bullet 2 to the power of negative 2 q end exponent bullet 2 to the power of 3 r end exponent f open parentheses p minus 2 q plus 3 r close parentheses equals fraction numerator 2 to the power of p bullet 2 to the power of 3 r end exponent over denominator 2 to the power of 2 q end exponent end fraction 

Perhatikan bahwa f open parentheses p close parentheses equals 2 to the power of p comma f open parentheses q close parentheses equals 2 to the power of q comma f open parentheses r close parentheses equals 2 to the power of r  , sehingga

f open parentheses p minus 2 q plus 3 r close parentheses equals fraction numerator 2 to the power of p bullet 2 to the power of 3 r end exponent over denominator 2 to the power of 2 q end exponent end fraction equals fraction numerator 2 to the power of p bullet open parentheses 2 to the power of r close parentheses cubed over denominator open parentheses 2 to the power of q close parentheses squared end fraction equals fraction numerator f open parentheses p close parentheses bullet open parentheses f open parentheses r close parentheses close parentheses cubed over denominator open parentheses f open parentheses q close parentheses close parentheses squared end fraction 

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Jika ( 2 x +3 y ,3) dan ( 5,4 x - y) memiliki pasangan terurut yang sama, maka nilai 2 x 2 − 3 y 2 + 2 x y − x + 5 y − 5 adalah ….

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