Odpowiedź:
a∈(-1:1)
a-1<0
a+1>0
|a-1| + |a+1| = -a+1+a+1=2
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Odpowiedź:
a∈(-1:1)
a-1<0
a+1>0
|a-1| + |a+1| = -a+1+a+1=2