SB ABBA. DOUBLE IKTIORAT10X. 



->**) IV* (-', 

 - 



'-- 8 



1. Sum. will be more c- to integrate 



<t with re* poet to x a with 



it tli. - : \ n area is comprised be- 

 li^ht lines yc', and y~A', and the curves 

 , and-^(y), we obtain 



->y: ? ' 



X- 



*-'' 



^ j - + v ,/y 



vc apply these to the example given in Art. 120, we have 

 -- v -, 4(y)jr, c'-O, and A' is to be found from the 



A' 4a 



equation r 7" J therefore h * -r- . 



!(>'- 



-"' 



r8-p* 



'tShS^ 



results will of course be the same as be: 



nations and illustrations of double intcpra- 



H referred to treatises on the Integral rTco- 



(See especially Literal Cofaifo, Art 141 and Art 152.) 



