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Himpunan penyelesaian dari 3 2 x − 6 ⋅ 3 x > 27 adalah...

Himpunan penyelesaian dari  adalah...

  1. begin mathsize 12px style open curly brackets x vertical line x less than negative 3 comma x element of R close curly brackets end style

  2. begin mathsize 12px style open curly brackets x vertical line x less than negative 2 comma x element of R close curly brackets end style

  3. begin mathsize 12px style open curly brackets x vertical line x greater than 3 comma x element of R close curly brackets end style

  4. begin mathsize 12px style open curly brackets x vertical line x greater than 2 comma x element of R close curly brackets end style

  5. begin mathsize 12px style open curly brackets x vertical line x greater than 9 comma x element of R close curly brackets end style

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Y. Laksmi

Master Teacher

Mahasiswa/Alumni Universitas Negeri Semarang

Jawaban terverifikasi

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Pembahasan

Sifat pertidaksamaan eksponen: , jika a > 1 maka f(x) > g(x) Pembuat nol fungsi: (tidak memenuhi) (memenuhi) Penyelesaiannya: Jadi, himpunan penyelesaiannya adalah

Sifat pertidaksamaan eksponen:

begin mathsize 12px style a to the power of f left parenthesis x right parenthesis end exponent greater than a to the power of g left parenthesis x right parenthesis end exponent end style, jika a > 1 maka f(x) > g(x)

begin mathsize 12px style 3 to the power of 2 x end exponent minus 6 times 3 to the power of x greater than 27  left right double arrow open parentheses 3 to the power of x close parentheses squared minus 6 times 3 to the power of x minus 27 greater than 0  left right double arrow open parentheses 3 to the power of x plus 3 close parentheses open parentheses 3 to the power of x minus 9 close parentheses greater than 0 end style

Pembuat nol fungsi:

  • begin mathsize 12px style 3 to the power of x equals negative 3 rightwards arrow end style(tidak memenuhi)
  • begin mathsize 12px style 3 to the power of x equals 9 rightwards arrow end style(memenuhi)

Penyelesaiannya:

begin mathsize 12px style 3 to the power of x greater than 9  left right double arrow 3 to the power of x greater than 3 squared  left right double arrow x greater than 2 end style

Jadi, himpunan penyelesaiannya adalah begin mathsize 12px style open curly brackets x vertical line x greater than 2 comma x element of R close curly brackets end style

 

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