52 EXAMPLES OF DIFFERENTIAL COEFFICIENTS. 



\-x*\ dy _ - 



~ 



/( 

 = V 



a; dy _ e*(l-a;)-l 



29 - *- 



qn _ 1 



si. ,= 



33. v = 



dx 

 x x 



1 



QJ ^.VO* 1 -* 1 ) 



o4. y = a 



^ <^y sec 2 a* , 



So. y = tan a . -jf- = -- 5 log e a . a 



30. y = 

 37. f-2a 



38. = 



j- = q r - 



dx, 1 + tana; 



