AS PRACTISED BY THE ARABS. 163 



Then 2-f | 2 = 4 -j- V 6 + if = 5 lf and deficiency ss T \- 

 Let A — 7 and assumed Root — 2&: 



Then 2-J | 2 = 4 -f y + If = 7 irr and deficiency - a. 



Let A = 8 and assumed Root — 2 f, and in this case r = 2 a, and 

 is a Maximum. 



Then 2f | 2 — 4 -f V + If = 8 lf and excess = -f-f-, 



Let A — 10 and assumed Root — 3 T 3 5 



Then 3^ 2 - 9 + A| -J- -^ = »H£ and deficiency r= ^ 



Let Ar 11 and assumed Root — 3-i, 

 Then 3^| 2 — 9 -f ff -f T W = lOfff and deficiency = ^ 



Let A — 12 and assumed Root =r 3-X, 



Then SSI ' ; = 9 + ff + fW = Hfff and deficiency = T 



Let A r= 13 and assumed Root = 3-^. 

 Then 3^| 2 = 9 -f- ff. + -^ - 13 T W and excess = -Mr- 



T 1 



6 9' 



