Jawab: = − 1 = − 2 1 + = 2 3 = 2 3 2 2 2 = 0 3 = 2 0 Sehingga, 3 = 0 2 0 2 √1 − 2 2 2 2 4 1 − = = 2 3 2 9 4 2 = 1 − 2 9 2 5 = 2 9 5 2 = √ 9 1 = √5 3 32