Materi : Barisan dan Geometri
Soal Nomor 1
-1, 3, 7, 11, ...
Suku Pertama = -1 , Beda = 4
Maka rumus pola : Un = 4n - 5
Maka U9 = 4(9) - 5 = 36 - 5 = 31
Materi : Fungsi dan Relasi
Soal Nomor 2
A( 2, 4, 6 ) => B( 1, 2, 3 )
Relasi : { (2,1) (4,2) (6,3) }
Soal Nomor 3
f(x) = 2x + 3
f(6) = 2(6) + 3 = 12 + 3 = 15
f(-5) = 2(-5) + 3 = -10 + 3 = -7
Soal Nomor 4
f(x) = 2x - 3
x = { -2, -1, 0, 1 }
y = { -7, -5, -3, -1 }
Materi : Persamaan Garis Lurus
Soal Nomor 5
3x + y = 2
y = - 3x + 2 [ m = -3 ]
Soal Nomor 6
m = ( - 5 - 1 )/( 3 + 2 )
m = (-6)/5
Soal Nomor 7
( y - 2 )/( 3 - 2 ) = ( x + 1 )/( 2 + 1 )
3( y - 2 ) = x + 1
3y - 6 = x + 1
x - 3y + 7 = 0
Soal Nomor 8
Gambar yang Terlampirkan
y = - 3x - 1 ( -⅓,0 ) dan ( 0,-1 )
Materi : SPLDV
Soal Nomor 9
x + 2y = 4
x - y = 1 [ x = y + 1 ]
---
x + 2y = 4
y + 1 + 2y = 4
3y = 4 - 1
3y = 3
[ y = 1 ]
---
x = y + 1
x = 1 + 1
[ x = 2 ]
HP = { ( 2,1 ) }
Soal Nomor 10
3x + 2y = 9.000
x + 3y = 6.500 [ x = 6.500 - 3y ]
3( 6.500 - 3y ) + 2y = 9.000
19.500 - 9y + 2y = 9.000
9y - 2y = 19.500 - 9.000
7y = 10.500
[ y = 1.500 ]
---
x = 6.500 - 3( 1.500 )
x = 6.500 - 4.500
[ x = 2.000 ]
HP = ( 2.000,1.500 )
10x + 5y = 10(2.000) + 5(1.500) = 27.500
Semoga bisa membantu
