Given that the absolute value of equation x = ax + 1 has a negative root but no positive root, then the value range of a is larger |x|=ax+1 When x > = 0, x = ax + 1, according to the meaning of the problem, the equation has no solution (at this time a = 1), or only negative solution (at this time 1-A = 1) When X-1 Finally, it is concluded that: a > = 1 ———————————————————————————— The question is not to say that there are negative roots but no positive roots. Why does the equation have no solution when a = 1 also count in the answer

Given that the absolute value of equation x = ax + 1 has a negative root but no positive root, then the value range of a is larger |x|=ax+1 When x > = 0, x = ax + 1, according to the meaning of the problem, the equation has no solution (at this time a = 1), or only negative solution (at this time 1-A = 1) When X-1 Finally, it is concluded that: a > = 1 ———————————————————————————— The question is not to say that there are negative roots but no positive roots. Why does the equation have no solution when a = 1 also count in the answer

The idea of the solution is to remove the absolute value according to the positive and negative discussion of X
Here the equation has no solution (a = 1),
When x > = 0, there is no solution
And the value of a = 1 is in X