Diketahui f(x) = px + q Jika f(-3) = 12, dan f(4) = 26, nilai p+2q

MAPEL = MATEMATIKA
KELAS = 8
BAB = RELASI & FUNGSI

diketahui :
- rumus fungsi ➡ f(x) = px + q
- f(-3) = 12
- f(4) = 26

ditanya : nilai p + 2q ??

f(-3) = px + q
➡ -3p + q = 12.......( 1 )

f(4) = px + q
➡ 4p + q = 26........( 2 )

eliminasi nilai q pada pers. ( 1 ) dan ( 2 )
4p + q = 26
-3p + q = 12
__________-
7p = 14
p = 14/7
p = 2

subtitusi nilai p = 2 pada pers. ( 2 )
4p + q = 26
4(2) + q = 26
q = 26 - 8
q = 18

nilai p + 2q :
= 2 + 2(18)
= 2 + 36
= 38

semoga membantu