- #1

s3a

- 818

- 8

## Homework Statement

Solve the following differential equation, by using the substitution u = y'.:

(y + 1) y'' = (y')^2

## Homework Equations

I'm assuming: Chain Rule

## The Attempt at a Solution

My problem is, simply, that I don't get how to go from

**u = y'**to

**y'' = u du/dy**, and I would appreciate it if someone could show me how!

Other than that, I should be fine.