... () 22 2 2 22 2 12 12 22 2 12 12 1 2 2 nnXX x Xxx xxxxxxx x∂∂ δ ∂δ+δ++δ+δδ++∂∂∂∂ δErrors δx1, δx 2 , , δxn all are small so that the terms containing (δx1) 2 , (δx 2 ) 2 , ... as 0 .29 , 0 .28 6, 0 .28 57, etc. The process of cuttingoff super-flouts digits and retaining as many digits as desired is known as rounding offa number or we can say that process of dropping unwanted ... values of π and e.(iii) Significant Figures: The significant figures are the number of digits used to express anumber. The digits 1, 2, 3, 4, 5, 6, 7, 8, 9 are significant digits. ‘0’ is also...