a)
f ( x ) = exp 5 ( x ) = exp ( x ) 5 = ( e x ) 5 = e 5 x
f ' ( x ) = 5 * e 5 x = 5 * exp 5 ( x )
b)
f ( x ) = 1 / ( x + 1 ) 2 = ( x + 1 ) - 2
f ' ( x ) = - 2 ( x + 1 ) - 3 = - 2 / ( x + 1 ) 3
c)
f ( x ) = exp ( - ( x n ) )
f ' ( x ) = - n * x ( n - 1 ) * exp ( - ( x n ) )