Obtain the differential coefficient of t...

Obtain the differential coefficient of the following :
(i) (x-1) (2x+5) `(ii) (9x^(3)-8x+7)(3x^(2)+5)`
(iii) `1/(2x+1)` (iv) `(3x+4)/(4x+5)` (v) `(x^(2))/(x^(3)+1)`

Verified by Experts

The correct Answer is:

`(i) (4x+3)`
`(ii) 216x^(7)-144x^(5)+105x^(4)+135x^(2)-40`
`(iii) -2/((2x+1)^(2))` (iv) `-1/((4x+5)^(2))` (v) `(2x-x^(4))/((x^(3)+1)^(2))`

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