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# Help: chain rule question differenetiation watch

1. The question is

Differentiate: y= 2e^(2x+1)

The answer is dy/dx = 4e^2x+1

please can anyone provide me with the working out to that answer step by step?

I'm not able to solve this one it's doesn't seem as straightforward as the others I've done
2. Differentiate the power (2x+1) this leaves you with 2. Multiply this by 2e^(2x+1) which leaves you with 4e^(2x+1).
explanation below:
3. let u = 2x+1, du/dx = 2.
you now have y = 2e^u
we know that dy/du = 2e^u
dy/dx = dy/du * du/dx (since the dus cancel)

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Updated: February 9, 2018
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