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=28/3√2-2107/3√2=(-2079/3√2)=(-693√2)
z8 2508,32zł=122%/122
20,56zł=1%
2199,92zł=107%
z9 192zł×120%×120%=192zł×1,2×1,2=192zł×1,44=276,48zł
z10 48,3×10 potęga (-13)/3,5×10 potęga (-32)=96,6×10 potęga 19/7=
=13,8×10 potęga 19=138.000.000.000.000.000.000
z11 100%-(100%-60%×(100%-30%))=100%-(40%×70%)=
=100%-(0,4×0,7)=100%-0,28=100%-28%=72%
odp:Obniżono cenę towaru o 72%.