2 / 1 of X (X & # 178; - 2 / 1 + X + 1 / 1) A & # 178; - 2A + 1 / A + 1 ÷ (1 + A-1 / 2)

2 / 1 of X (X & # 178; - 2 / 1 + X + 1 / 1) A & # 178; - 2A + 1 / A + 1 ÷ (1 + A-1 / 2)


The original formula = 2 / (x-1) / [2 / (x + 1) (x-1) + (x-1) / (x + 1) (x-1)] = 2 / (x-1) / (2 + x-1) / (x + 1) (x-1) = 2 / (x-1) × (x-1) = 2 the original formula = (a + 1) / (A-1) & # 178; / [(A-1) / (A-1) + 2 / (A-1)] = (a + 1) / (A-1) & # 178; / [(A-1) + 2] / (A-1) = (a + 1) / (A-1) & # 178; × (A-1)



Let's simplify the following
80:48 5 / 6: 5 / 9 0.5:2.5


5:3
3:2
1:5