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Diketahui polinomial  dengan . Jika , nilai  adalah ...

Pertanyaan

 Diketahui polinomial Error converting from MathML to accessible text. dengan begin mathsize 14px style p left parenthesis x right parenthesis equals 3 q left parenthesis x right parenthesis minus 2 r left parenthesis x right parenthesis end style. Jika begin mathsize 14px style p left parenthesis negative 5 right parenthesis equals 4 space text dan end text space q left parenthesis negative 5 right parenthesis equals negative 3 end style, nilai begin mathsize 14px style r left parenthesis negative 5 right parenthesis end style adalah ...

  1. size 14px 26 

  2. size 14px 6 size 14px. size 14px 5 

  3. size 14px minus size 14px 6 size 14px. size 14px 5 

  4. size 14px minus size 14px 13 

  5. size 14px minus size 14px 26 

Pembahasan Video:

Pembahasan Soal:

Diketahui begin mathsize 14px style p open parentheses negative 5 close parentheses equals 4 comma space q open parentheses negative 5 close parentheses equals negative 3 end style, dan begin mathsize 14px style p open parentheses x close parentheses equals 3 q open parentheses x close parentheses minus 2 r open parentheses x close parentheses end style, maka:

begin mathsize 14px style space space space space space space space space space space space space space space p left parenthesis x right parenthesis equals 3 q left parenthesis x right parenthesis minus 2 r left parenthesis x right parenthesis space space space space space space space space space space space p left parenthesis negative 5 right parenthesis equals 3 q left parenthesis negative 5 right parenthesis minus 2 r left parenthesis negative 5 right parenthesis space space space space space space space space space space space space space space space space space space space 4 equals 3 open parentheses negative 3 close parentheses minus 2 r open parentheses negative 5 close parentheses space space space space space space space space space space space space space space space space space space space 4 equals negative 9 minus 2 r open parentheses negative 5 close parentheses minus 9 minus 2 r left parenthesis negative 5 right parenthesis equals 4 space space space space space space minus 2 r open parentheses negative 5 close parentheses equals 4 plus 9 space space space space space space minus 2 r open parentheses negative 5 close parentheses equals 13 space space space space space space space space space space space r open parentheses negative 5 close parentheses equals fraction numerator 13 over denominator negative 2 end fraction space space space space space space space space space space space r open parentheses negative 5 close parentheses equals negative 6 comma 5 end style 

Jadi, jawaban yang benar adalah C.

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 12 April 2021

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