# Math Help - find dy/dx

1. ## find dy/dx

y = square root (8 + 7x)

find dy/dx

By chain rule:

1/2 (8+7x)^(-1/2) * (7)

2. I like it.

3. Make sure to write the derivative using the same notation the original function is given.

Since it is given using radicals, write the derivative using radicals as well.

$y = \sqrt{8 + 7x}$

$\frac{dy}{dx} = \frac{7}{2\sqrt{8 + 7x}}$.