Solve each of the following equation: +
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Please show step by step

Find the power series expantion of f(z)=log(4=3z) at the point z=-1

Which is the completely factored from of xy^3-x^3y

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.