Identify which of the following differential equations are exact. 1 point each. 3yt2 + (y3 + t3)dy dt = 0 ln(y)dy dt = 0 tsin(y) + t2cos(y)2 dy dt = 4t dy dt = t2 y3 t y + y t dy dt = 0 t2 + y3 + (y2 + t3)dy dt = 0
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Identify which of the following differential equations are exact. 1 point each.