如果a与b互为相反数,c与d互为倒数,求2|a+b|-cd的值······急啊···········如果a与b互为相反数,c与d互为倒数,求2|a+b|-cd的值!快··············
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如果a与b互为相反数,c与d互为倒数,求2|a+b|-cd的值······急啊···········如果a与b互为相反数,c与d互为倒数,求2|a+b|-cd的值!快··············如果a
如果a与b互为相反数,c与d互为倒数,求2|a+b|-cd的值······急啊···········如果a与b互为相反数,c与d互为倒数,求2|a+b|-cd的值!快··············
如果a与b互为相反数,c与d互为倒数,求2|a+b|-cd的值······急啊···········
如果a与b互为相反数,c与d互为倒数,求2|a+b|-cd的值!快··············
如果a与b互为相反数,c与d互为倒数,求2|a+b|-cd的值······急啊···········如果a与b互为相反数,c与d互为倒数,求2|a+b|-cd的值!快··············
a与b互为相反数,c与d互为倒数
a+b=0 c*d=1
2|a+b|-cd
=2*0-1
=-1
a+b=0,cd=1
所以-1
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