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X 6 2 t. {X:X=T^2, -1< T< 2. X1 4+0.5t x2 8-2t. Х1=2+4t x2=3t. X 2 4t t2.
{X:X=T^2, -1< T< 2. X1 4+0.5t x2 8-2t. Х1=2+4t x2=3t. X 2 4t t2.