Current location - Training Enrollment Network - Mathematics courses - High school math collection questions are free.
High school math collection questions are free.
Solution: ∫C = A∩B

Set c is a single element set.

∴ simultaneous a and b, get: a | x | = x+a.

(1) when x >; 0, X=a/(a- 1)>0, found one.

(2) when x < 0 and x =-a/(a+ 1) < 0, find a.

(3) When X=0, find a=0.

∴ To make C a single element set, it is necessary to (1)(2)(3) not have two different solutions at the same time.

- 1 & lt; a & lt 1.