The operation of fraction in grade eight It is known that a is not equal to B, B is not equal to C, C is not equal to a, and a / (B-C) + B / (C-A) + C / (a-b) = 0 It is proved that a / (B-C) ^ 2 + B / (C-A) ^ 2 + C / (a-b) ^ 2 = 0

The operation of fraction in grade eight It is known that a is not equal to B, B is not equal to C, C is not equal to a, and a / (B-C) + B / (C-A) + C / (a-b) = 0 It is proved that a / (B-C) ^ 2 + B / (C-A) ^ 2 + C / (a-b) ^ 2 = 0

Take a / (B-C) + B / (C-A) + C / (a-b) = 0 and multiply (a-b) (B-C) (C-A) to get a (a-b) (C-A) + B (a-b) (B-C) + C (B-C) (C-A) = 0. Take a / (B-C) ^ 2 + B / (C-A) ^ 2 + C / (a-b) ^ 2 and multiply (a-b) (B-C) (C-A) to get C (B-C) (C-A) ^ 2 + a (b) (B-C) ^ 2