Question

已知a与2b互为倒数,-c与b/2为相反数,绝对值x等于4,求4*a*b-2c+b+x/4的结果?

Answer 1

因为a与2b互为倒数,-c与b/2为相反数,绝对值x等于4

所以a=1/2b,c=-b/2,x=4或-4

则当x=4时,原式=4*1/2b*b-(-b)+b+1=3+2b

当x=-4时,原式=4*1/2b*b-(-b)+b-1=1+2