挑战习题
1/5单选题
难度:

1.方程2x+1=x的解也是关于x的方程2x-kx+1=0的解,则k的值为(    )
A 3
B -3
C 1
D -1
提示1:
IOino+avj+S4gOS4quaWueeoiw==
提示2:
IOiuqeaWueeoi+eahOino+ebuOetie+8jOW7uueri+aWsOeahOaWueeoiw==
提示3:
IOino+aWsOeahOaWueeoiw==
正确答案:Qw==
6Kej77ya4oi1MngrMT14PGJyPng9LTEuIDxicj7iiLQyeC1reCsxPTA8YnI+4oi0PGltZyB3aWR0aD00NCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9FRS9EQi9yQkFDRTFOUE04ekRzLUlHQUFBQnBVNkdzSHM0MTUucG5nIj48YnI+5omA5LulPGltZyB3aWR0aD0xOSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9FRS9EQi9yQkFDRTFOUE04eVJZdHNxQUFBQlYwUXlCdnc4ODMucG5nIj49LTEuIDxicj7miYDku6VrPTE8YnI+5pWF6YCJQy4g