# Math Help - Differential Calculus

1. ## Differential Calculus

Hi

For these questions:

Differentiate with respect to x:

(a) y = $2/(2x+3)^4$

(b) y = $x^2 + 2/x - 1$

(c) y = $(x^3+1)/(x+1)$

Are the answers:

(a) $(-24)/(2x+3)^5$

(b) $2x - 2/x^2$

(c) $(2x^3 + 3x^2 - 1)/(x+1)^2$

Thanx very much!

2. The first one is $\frac{-16}{(2x+3)^5}$
The others are correct.