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Himpunan semua nilai x yang memenuhi pertidaksamaan 5 2 x − 5 x + 1 − 5 x + 5 > 0 adalah …

Himpunan semua nilai x  yang memenuhi pertidaksamaan  adalah …

  1. begin mathsize 14px style open curly brackets straight x vertical line 0 less than straight x less than 1 close curly brackets end style 

  2. begin mathsize 14px style open curly brackets straight x vertical line straight x less than 0 space atau space straight x greater than 1 close curly brackets end style 

  3. begin mathsize 14px style open curly brackets straight x vertical line straight x less than 0 close curly brackets end style 

  4. begin mathsize 14px style open curly brackets straight x vertical line straight x greater than 1 close curly brackets end style 

  5. begin mathsize 14px style open curly brackets straight x vertical line straight x greater than 0 close curly brackets end style 

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A. Nadhira

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

Jawaban terverifikasi

Jawaban

 begin mathsize 14px style HP equals open curly brackets straight x vertical line straight x less than 0 space atau space straight x greater than 1 comma straight x element of straight R close curly brackets end style 

Pembahasan

Misalkan maka persamaan diatas dapat diubah menjadi Sehingga diperoleh daerah himpunan penyelesian pada garis bilangan berikut ini. Maka, Jadi

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell 5 to the power of 2 straight x end exponent minus 5 to the power of straight x plus 1 end exponent minus 5 to the power of straight x plus 5 end cell greater than 0 row cell 5 to the power of 2 straight x end exponent minus 5.5 to the power of straight x minus 5 to the power of straight x plus 5 end cell greater than 0 row cell 5 to the power of 2 straight x end exponent minus 6.5 to the power of straight x plus 5 end cell greater than 0 end table end style 

Misalkan begin mathsize 14px style 5 to the power of straight x equals straight p end style maka persamaan diatas dapat diubah menjadi

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell straight p squared minus 6 straight p plus 5 end cell greater than 0 row cell left parenthesis straight p minus 1 right parenthesis left parenthesis straight p minus 5 right parenthesis end cell greater than 0 end table end style 

Sehingga diperoleh daerah himpunan penyelesian pada garis bilangan berikut ini.

 

Maka,

begin mathsize 14px style straight p less than 1 space atau space straight p greater than 5 straight p less than 1 5 to the power of straight x less than 1 rightwards arrow 5 to the power of straight x less than 5 to the power of 0 rightwards arrow straight x less than 0 straight p greater than 5 5 to the power of straight x greater than 5 rightwards arrow 5 to the power of straight x greater than 5 to the power of 1 rightwards arrow straight x greater than 1 end style 

Jadi begin mathsize 14px style HP equals open curly brackets straight x vertical line straight x less than 0 space atau space straight x greater than 1 comma straight x element of straight R close curly brackets end style 

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