Answer :
(i) 
= 
Formulae:
= n
- cosec2x
ax = logn(a)×ax
Differentiating with respect to x,
= 4.3x3-1 + 3.logn(2).2x + 6×-
+ 5 ×- cosec2x
= 12x2 + 3.logn(2).2x -3
-5 cosec2x
(ii) 
= 
= n
ax = logn(a)×ax
Differentiating with respect to x,
=
= 
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