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Fungsi  turun pada interval ...

Pertanyaan

Fungsi begin mathsize 14px style f open parentheses x close parentheses equals x cubed minus 3 x squared minus 9 x plus 15 end style turun pada interval ...

  1. begin mathsize 14px style x less than negative 3 space text atau end text space x greater than 1 end style 

  2. begin mathsize 14px style x less than negative 1 space text atau end text space x greater than 3 end style 

  3. begin mathsize 14px style x less than negative 3 space text atau end text space x greater than negative 1 end style 

  4. begin mathsize 14px style negative 1 less than x less than 3 end style 

  5. begin mathsize 14px style 1 less than x less than 3 end style 

Pembahasan Soal:

Fungsi begin mathsize 14px style f open parentheses x close parentheses end style turun apabila begin mathsize 14px style f apostrophe open parentheses x close parentheses less than 0 end style

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell f open parentheses x close parentheses end cell equals cell x cubed minus 3 x squared minus 9 x plus 15 end cell row cell f apostrophe open parentheses x close parentheses end cell equals cell 3 x squared minus 6 x minus 9 end cell end table end style

Fungsi  begin mathsize 14px style f open parentheses x close parentheses end style turun pada interval berikut.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell f apostrophe open parentheses x close parentheses end cell less than 0 row cell 3 x squared minus 6 x minus 9 end cell less than 0 row cell x squared minus 2 x minus 3 end cell less than 0 row cell open parentheses x plus 1 close parentheses open parentheses x minus 3 close parentheses end cell less than 0 end table end style

begin mathsize 14px style negative 1 less than x less than 3 end style

Oleh karena itu, jawaban yang tepat adalah D.

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 02 April 2021

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