# Chain Rule

**Question**

Using chain rule, write down the derivative function for the following functions.

- y = (x+2)
^{3} - y = 1/(x+3)

**Answer**

- 3(x+2)
^{2} - -1/(x+3)
^{2}

*Note:*

*dy/dx = dy/du * du/dx**Where**y = f(u)**u = g(x)**Chain rules is normally applied to a composite function.*

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