Pertanyaan

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

11
9
-9
-11

R. RGFLSATU

Master Teacher

Jawaban terverifikasi

Pembahasan

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