If y is the solution of the differential equation \({y^3}\frac{{dy}}{{dx}} + {x^3} = 0,y\left( 0 \right) = 1\), the value of y (-1) is
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If y is the solution of the differential equation \({y^3}\frac{{dy}}{{dx}} + {x^3} = 0,y\left( 0 \right) = 1\), the value of y (-1) is