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Fungsi g didefinisikan dengan rumus g(x)=qx+r. Nilai g(2) = -7 dan g(-5) =7. Nilai g(4) adalah ....

Fungsi g didefinisikan dengan rumus g(x)=qx+r. Nilai g(2) = -7 dan g(-5) =7. Nilai g(4) adalah ....

  1. 11

  2. 9

  3. -9

  4. -11

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R. RGFLSATU

Master Teacher

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g left parenthesis x right parenthesis equals q x plus r  g left parenthesis 2 right parenthesis space equals q left parenthesis 2 right parenthesis plus r equals negative 7  space space space space space space space space space equals 2 q plus r space 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 space space space space space space space space space space equals negative 5 q plus r space equals 7    2 q plus r equals negative 7  minus 5 q plus r equals 7 space space space space subscript minus  top enclose space space space space 7 q equals negative 14 space space space space end enclose space space space  q equals fraction numerator negative 14 over denominator 7 end fraction  q equals negative 2    S e h i n g g a space c a r i space r  minus 5 q plus r space equals 7  minus 5 left parenthesis negative 2 right parenthesis plus r equals 7  10 plus r equals 7  r equals 7 minus 10  r equals negative 3    g left parenthesis x right parenthesis space equals negative 2 x minus 3  g left parenthesis 4 right parenthesis space equals space minus 2 left parenthesis 4 right parenthesis minus 3  space space space space space space space space equals negative 8 minus 3  space space space space space space space space equals negative 11

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