Solve for both x and y

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

Can someone me out here number 4 plz

Sample response: if the graph passes the horizontaline test, then the function is one to one. functions that are one to one have inverses that a therefore, the inverse is a hinction compare your response to the sample response above. what did you include in your explanation? a reference to the horizontal-line test d a statement that the function is one-to-one the conclusion that the inverse is a function done