20 points (if you don't know, don't answer) which equation shows euler's formula? v + e = f + 2 v + e = f - 2 v + f = e + 2 v + f = e - 2

Although china's total economic output, measured by gross domestic product (gdp), is third largest in the world, it is considered a developing nation. what is most likely the most important factor for this designation?