( 125 ) 
r dx 
/ 2 * 
j 1 
0 
r“ dx 
I(l + X)--— == 2A + B, (46) 
/ 
"o 
/■“ 1 dx 
/ = 
0 
r“ rf:r 
l(l+^^)Y2r, =8A (4.8) 
J i+« 
0 
= 
■fl 
r“i 
/ i'i'—-i‘ ,+>-"* 
'[‘{^] t ^-“*‘ '•" 
+ '”' 
h ' fc ”.')’,:',-“-'..'“' 
0 
/■®1 / 1_^\2 
/ 1 I == 2A — B, . . (54) 
J 2 [ X J 1 + x-^ 
0 
/' rnnfe -'* 
p (-s^) 4-.; - “ « 
*0 
