::AugustO, I congratulate you on your clear understanding of the issues involved. From your writing above, you seem to have a good understanding of the derivative of x<sup>3</sup>, and of its connection with accuracy in physical measurements. [[User:SamHB|SamHB]] 00:36, 29 June 2015 (EDT) | ::AugustO, I congratulate you on your clear understanding of the issues involved. From your writing above, you seem to have a good understanding of the derivative of x<sup>3</sup>, and of its connection with accuracy in physical measurements. [[User:SamHB|SamHB]] 00:36, 29 June 2015 (EDT) |