(a-1)x-(a+1)x+1=0两根互为倒数,则a=?怎么化简?

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(a-1)x-(a+1)x+1=0两根互为倒数,则a=?怎么化简?(a-1)x-(a+1)x+1=0两根互为倒数,则a=?怎么化简?(a-1)x-(a+1)x+1=0两根互为倒数,则a=?怎么化简?根

(a-1)x-(a+1)x+1=0两根互为倒数,则a=?怎么化简?
(a-1)x-(a+1)x+1=0两根互为倒数,则a=?怎么化简?

(a-1)x-(a+1)x+1=0两根互为倒数,则a=?怎么化简?
根据韦达定理,x1×x2=1/(a^2-1)=1,得a=正负跟号2