Oblicz:
a) Ι a-4 Ι + a dla a ∈ (-nieskończoność ; 4)
b) Ι -5 Ι - Ι -6 Ι
a)
-(a-4)+a=-a+4+a=4
b)
-(-5)+(-6)=5-6=-1
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a)
-(a-4)+a=-a+4+a=4
b)
-(-5)+(-6)=5-6=-1
a)
-(a-4)+a=-a+4+a=4
b)
-(-5)+(-6)=5-6=-1