Why is finding the factor pairs only the first step in solving a problem?

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Solve the equation.then check your solution 8=1.88+a

The gdp is $1,465.2 billion. the population is 249,793,675. find the per capita gdp.