Page 14 - Bahan Ajar Bismillah(2)

Penyelesaian

a. = 2 + 1

Misal: = → = 1
′
′
= 2 + 1 → = 2
Jadi jika = . , maka ′ = ′ + ′

′
= 1. 2 + 1 + 2.
′
= 2 + 1 + 2
′
= 4 + 1 atau = 4 + 1

2
b. = 4 5 + 3
2
′
Misal: = 4 → = 8
′
= 5 + 3 → = 5
Jadi jika = . , maka ′ = ′ + ′

′
= 8 . 5 + 3 + 5. 4
2
2
2
′
= 40 + 24 + 20
2
′
2
= 60 + 24 atau = 60 + 24

c. = 2 + 1 − 4
′
Misal: = 2 + 1 → = 2
= − 4 → = 1
′
Jadi jika = . , maka ′ = ′ + ′
′
= 2. − 4 + 1. 2 + 1
′
= 2 − 8 + 2 + 1
′
= 4 − 7 atau = 4 − 7

2
d. = − 5 2 − 7
Misal: = − 5 → = 2
′
2
′
= 2 − 7 → = 2
Jadi jika = . , maka ′ = ′ + ′

′
= 2 . 2 − 7 + 2. − 5
2
2
′
= 4 − 14 + 2 − 10
2
10 | P a g e K E L A S X I