Wyrażenie ||x|+1| dla x<0 jest równe:
A. x+1
B. x-1
C. -x+1
D. -x-1
IIxI+1I=I-x+1I=-x+1 (x<0, to -x>0)
odp. C
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IIxI+1I=I-x+1I=-x+1 (x<0, to -x>0)
odp. C