as the problem said, you want to be accurate to 5 decimal places, so keep finding a better approximation until the first 5 decimal places do not change

i suppose you mean the initial guess?and how do I find P0 and P1?

first note that you have

so a good initial guess would be one where is close to . in fact, it is an equivalent problem to solve . would be easier to run Newton's method on it too. you can use a graph to come up with a guess

Hope that helps