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600=at
4=at²
a=600/t
4=600t
600=at
t=1/150
600=a/150
t=1/150
a=90000
at=600
t²=4/a
a=600/t
t²=4/600÷t
t²=t/150
t²-t/150=0 ×150
150t² -t =0
t(150t-1)=0
t=0 lub 150t -1=0 t=1/150
a=0 sprzecznośc
a= 600÷1/150 = 90000,9