" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
2x+3 = x
2x-x = -3
x = -3
_____ -3_____ 0_____
uji x dibawah -3, misal x= -4
uji x diatas -3, misal x=-1
uji x diatas 0, misal x = 1
++++ -3 ----- 0 ++++
karena pers < 0, maka
Hp {-3 < x < 0}
3. garis lurus : y = mx+c
tahun pertama --> x = 1 --> y = 110
110 = m(1)+ c --> m+c = 110 ..pers 1
tahun ke tiga --> x = 3 --> y = 150
150 = m(3)+ c --> 3m+c = 150 ..pers 2
pers 1 : m+c = 110
pers 2 : 3m+c = 150
------------------- -
-2m = -40
m = 20
m+c = 110
c = 110-m
=110-20
= 90
sehingga pers y =20x+90
producksi tahun ke 15 --> x = 15
y = 20(15)+90
= 300+90
= 390