Diketahui fungsi g(x)= mx-9,jika9 (4) = 3, tentukan: a. Nilai m b. Bentuk fungsi. c. Nilai fungsi g (-4) d. Nilai a jika g (a) = 21

a) nilai m
g(x)=mx-9
g(4)=3
(m×4)-9=3
4m=3+9=12
m=12:4
m=3

b) bentuk fungsi
g(x)=mx-9
g(x)=3x-9

c) nilai fungsi g(-4)
g(-4)=3(-4)-9
=-12-9
=-21

d) nilai a jika g(a)=21
g(a)=21
3a-9=21
3a=21+9
3a=30
a=30:3
a=10