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Pertanyaan

Jika 81 lo g x 1 ​ = x lo g y 1 ​ = y lo g 81 1 ​ , maka 2x - 3y = ...

Jika , maka 2x - 3y = ...

  1. -162

  2. -81

  3. 0

  4. 81

  5. 162

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A. Nadhira

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

Jawaban terverifikasi

Pembahasan

Karena ketiga ruas sama, maka diperoleh: Kalikan pers 1 dan pers 2 Maka nilai dari:

begin mathsize 14px style blank to the power of 81 log invisible function application 1 over x equals to the power of x log invisible function application 1 over y equals to the power of y log invisible function application 1 over 81 to the power of 81 log invisible function application x to the power of negative 1 end exponent equals to the power of x log invisible function application y to the power of negative 1 end exponent equals to the power of y log invisible function application 81 to the power of negative 1 end exponent minus 1 space to the power of 81 log invisible function application x equals negative 1 space to the power of x log invisible function application y equals negative 1 space to the power of y log invisible function application 81 to the power of 81 log invisible function application x equals to the power of x log invisible function application y equals to the power of y log invisible function application 81 end style  

Karena ketiga ruas sama, maka diperoleh:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell blank to the power of 81 log invisible function application x equals to the power of y log invisible function application 81 horizontal ellipsis p e r s open parentheses 1 close parentheses to the power of x log invisible function application y equals to the power of y log invisible function application 81 horizontal ellipsis p e r s open parentheses 2 close parentheses end cell end table end style  

Kalikan pers 1 dan pers 2

Error converting from MathML to accessible text.  

Maka nilai dari:

begin mathsize 14px style 2 x minus 3 y equals negative 81 end style  

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