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Penyelesaian pertidaksamaan ∣ 3 − 2 x ∣ ≥ 1 − x adalah ...

Penyelesaian pertidaksamaan  adalah ...

  1. x greater or equal than 2 

  2. x less than 2 

  3. x less or equal than negative 2 space atau space x greater or equal than 1 1 third 

  4. x less or equal than negative 2 space atau space 1 less or equal than x less than 2 

  5. 1 1 third less or equal than x less or equal than 2 

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S. Eka

Master Teacher

Mahasiswa/Alumni Universitas Pendidikan Indonesia

Jawaban terverifikasi

Jawaban

tidak ada jawaban yang tepat pada opsi soal.

tidak ada jawaban yang tepat pada opsi soal.

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Pembahasan

Ingat bahwa: Jika maka . Sehingga diperoleh Untuk memastikan lakukanlah uji titik pada garis bilangan. Misal Misal Misal Berdasarkan pemisalan setiap daerah penyelesaian di atas, diperoleh bahwa penyelesaian dari pertidaksamaan adalah . Jadi, tidak ada jawaban yang tepat pada opsi soal.

Ingat bahwa:

Jika open vertical bar f left parenthesis x right parenthesis close vertical bar greater or equal than a maka f left parenthesis x right parenthesis less or equal than negative a space atau space f left parenthesis x right parenthesis greater or equal than a.

Sehingga diperoleh

table attributes columnalign right center left columnspacing 0px end attributes row cell open vertical bar 3 minus 2 x close vertical bar end cell greater or equal than cell 1 minus x end cell row cell 3 minus 2 x end cell less or equal than cell negative left parenthesis 1 minus x right parenthesis end cell row cell 3 minus 2 x end cell less or equal than cell negative 1 plus x end cell row cell negative 2 x minus x end cell less or equal than cell negative 1 minus 3 end cell row cell negative 3 x end cell less or equal than cell negative 4 end cell row x greater or equal than cell 4 over 3 end cell row x greater or equal than cell 1 1 third end cell row blank blank atau row cell 3 minus 2 straight x end cell greater or equal than cell 1 minus straight x end cell row cell negative 2 straight x plus straight x end cell greater or equal than cell 1 minus 3 end cell row cell negative straight x end cell greater or equal than cell negative 2 end cell row straight x less or equal than 2 end table

Untuk memastikan lakukanlah uji titik pada garis bilangan.

Misal x equals 1

table attributes columnalign right center left columnspacing 0px end attributes row cell open vertical bar 3 minus 2 x close vertical bar end cell greater or equal than cell 1 minus x end cell row cell open vertical bar 3 minus 2 left parenthesis 1 right parenthesis close vertical bar end cell greater or equal than cell 1 minus 1 end cell row cell open vertical bar 3 minus 2 close vertical bar end cell greater or equal than 0 row 1 greater or equal than cell 0 horizontal ellipsis open parentheses benar close parentheses end cell end table

Misal x equals 5 over 3

table attributes columnalign right center left columnspacing 0px end attributes row cell open vertical bar 3 minus 2 x close vertical bar end cell greater or equal than cell 1 minus x end cell row cell open vertical bar 3 minus 2 open parentheses 5 over 3 close parentheses close vertical bar end cell greater or equal than cell 1 minus 5 over 3 end cell row cell open vertical bar 3 minus 10 over 3 close vertical bar end cell greater or equal than cell 3 over 3 minus 5 over 3 end cell row cell open vertical bar 9 over 3 minus 10 over 3 close vertical bar end cell greater or equal than cell negative 2 over 3 end cell row cell open vertical bar negative 1 third close vertical bar end cell greater or equal than cell negative 2 over 3 end cell row cell 1 third end cell greater or equal than cell negative 2 over 3 horizontal ellipsis open parentheses benar close parentheses end cell end table

Misal x equals 3

table attributes columnalign right center left columnspacing 0px end attributes row cell open vertical bar 3 minus 2 x close vertical bar end cell greater or equal than cell 1 minus x end cell row cell open vertical bar 3 minus 2 left parenthesis 3 right parenthesis close vertical bar end cell greater or equal than cell 1 minus 3 end cell row cell open vertical bar 3 minus 6 close vertical bar end cell greater or equal than cell negative 2 end cell row cell open vertical bar negative 3 close vertical bar end cell greater or equal than cell negative 2 end cell row 3 greater or equal than cell negative 2 horizontal ellipsis open parentheses benar close parentheses end cell end table

Berdasarkan pemisalan setiap daerah penyelesaian di atas, diperoleh bahwa penyelesaian dari pertidaksamaan open vertical bar 3 minus 2 x close vertical bar greater or equal than 1 minus x adalah x element of open curly brackets bilangan space real close curly brackets.

Jadi, tidak ada jawaban yang tepat pada opsi soal.

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