Pertanyaan

Fungsi g didefinisikan dengan rumus g ( x ) = q x + r . Nilai g ( 2 ) = − 7 d an g ( − 5 ) = 7 . Nilai g(4) adalah ...

Fungsi g didefinisikan dengan rumus $g (x) = q x + r$ . Nilai $g (2) = - 7 d an g (- 5) = 7$ . Nilai g(4) adalah ...

11
9
-9
-11

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F. Kurnia

Master Teacher

Mahasiswa/Alumni Universitas Jember

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Pembahasan

$g left parenthesis x right parenthesis equals q x plus r space g left parenthesis 2 right parenthesis space equals q left parenthesis 2 right parenthesis plus r equals space minus 7 space equals 2 q plus r equals space minus 7 space g left parenthesis negative 5 right parenthesis equals q left parenthesis negative 5 right parenthesis plus r equals 7 space equals negative 5 q plus r equals 7 space space space 2 q plus r equals space minus 7 space minus 5 q plus r equals 7 space space space space space space space space space space space 7 q equals space minus 14 space q equals space fraction numerator negative 14 over denominator 7 end fraction space equals space minus 2 S e l a n j u t n y a space c a r i space r space minus 5 q plus r equals 7 space minus 5 left parenthesis negative 2 right parenthesis plus r equals 7 space 10 plus r equals 7 space r equals 7 minus 10 equals space minus 3 space g left parenthesis x right parenthesis equals negative 2 x minus 3 space g left parenthesis 4 right parenthesis equals space minus 2 left parenthesis 4 right parenthesis minus 3 space equals space minus 8 minus 3 equals negative 11$