Given that a and B are opposite to each other, X and y are negative reciprocal to each other, | C | = 3, find the value of 1 / 3C (XY) - 2 / 3C (a + b) - 4 / 3C (XY)

Given that a and B are opposite to each other, X and y are negative reciprocal to each other, | C | = 3, find the value of 1 / 3C (XY) - 2 / 3C (a + b) - 4 / 3C (XY)

a. When C = 3, 1 / 3C (XY) - 2 / 3C (a + b) - 4 / 3C (XY) = 1 / 3 × 3 × (- 1) - 2 / 3 × 3 × 0-4 / 3 × 3 × (- 1) = - 3-0 + 4 = 1. When C = - 3, 1 / 3C (XY) - 2 / 3C (a + b) - 4 / 3C (XY) = 1 / 3 × 3 × (- 1) - 2 / 3 × 3 × 0-4 / 3 × 3 × (- 1) = - 3-0 + 4 = 1