Differentiate
(v) (uv)′ = u′v + uv′ (Leibnitz or product rule)
Let us take u = (
) and v = (
)
Applying Product rule
(gh)′ = g′h + gh′
Taking g = 
and h = 
= 
+ 
u’ =
- 
u’ =
Putting the above obtained values in the formula:-
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