1. If a and B are opposite to each other and C and D are reciprocal to each other, then 2004 · (a + b) △ 2CD=

1. If a and B are opposite to each other and C and D are reciprocal to each other, then 2004 · (a + b) △ 2CD=


A and B are opposite numbers? Then the answer is 0! A + B = 0



If a, B are opposite numbers and C, D are reciprocal, then 2CD + A + B =?


2cd+a+b=2*1+(a+b)=2



If a'B is opposite to each other and c'd is reciprocal to each other, then 2CD + A + B = what


C'd reciprocal
cd1
A'B is opposite to each other
a+b=0
2cd+a+b=2