172 



PRACTICAL MATHEMATICS 



<) I 



dx 



I V 02 - 120 + 52 

 (23) f \/0 2 _ 120 + 52 dx 

 dx 



A/20 2 +60+7 



(25) } 



(27) I \/20 2 +60+7 dx 



(29) JV0 2 -16 

 (31) \/0 2 - 16 dx 



(33) f / dx 



J V0 2 + 100 



(35) J, 



(37) f , ** 



J \/0 ? ' - 40 - 



(39) JV, 



(41\ I. 



J A/50 2 + 1(Xr _ 16 



(43) J 



100 



d0 

 - 4a 



/ 2 - 40 - 21 d0 

 cZ0 



+ 100 - 16 dx 



(22) 



(44) 



(60 - 5) dx 

 Vx 2 - 120 + 52 



r(0 2 -30 + 4)<fe 



JA/0 2 - 120+52 

 (30 7) dx 



A/20 2 +60+7 



J: 



r (402 - 3) dx 

 .M 



(26) 



(28) i ; 



J A/20 2 + 60+7 



(30) (2^.1?)^ 



J V0 2 - 



(32) 



A/0 2 - 16 

 [(302 -80+1) dx 



(34) J) 



Vx 2 - 16 

 '(60 - 5) cZ0 

 A/0 2 +100 



(36) [ ( * 2 + 120 - 7) dx 



J A/0 2 + 100 



(38) f (-7)<fa 



J A/0 2 - 40 - 21 

 r(302 - 70 + 13) dx 

 J Vx 2 - 40 - 21 

 f (150-8)cfe 

 J A/50 2 + jo-j, _ 16 



[ (120 2 + 7) dx 

 J \/50 2 + 100 - 16 



