If the reciprocal of a + B + D is equal to the reciprocal of C + 3, C + D is the opposite

If the reciprocal of a + B + D is equal to the reciprocal of C + 3, C + D is the opposite

∵ a, B are opposite to each other, C, D are reciprocal to each other, and the absolute value of M is equal to 3
A + B = 0 CD = 1 m = 3 or - 3
The original formula = (a + b) / (a + B + C) + 2cd-m
=0/(a+b+c) +2×1-m
=2-m
=-1 or 5

Given that a and B are opposite to each other, C and D are reciprocal to each other, and the absolute value of M is 2, the value of a + BM + m-2cd is obtained

According to the meaning of the question: a + B = 0, CD = 1, M = 2 or - 2, when m = 2, the original formula = 0 + 2-2 = 0; when m = - 2, the original formula = 0-2-2 = - 4

If a ≠ 0, find the value of 3A + 3B + Ba + 12CD

According to the meaning of the question, a + B = 0, Ba = - 1, CD = 1, 3A + 3B + Ba + 12CD = 3 (a + b) - 1 + 12 = - 12