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I am going through some worked examples for a class I have, and there is one step I don't understand, and I hope someone can help me with that.

It goes from

[itex]\frac{1}{D_pB}\int e^{x/d}(-de^{-W_B/d} + de^{-x/d}) dx[/itex]

to

[itex]\frac{1}{D_pB}\int (1 - e^{x-W_B/d}) dx[/itex]

The limits are 0 to W_{B}

I have tried to work through a few things, such as multiplying out the brackets and all, but I am not getting it right, so I am doing something wrong.

Thanks.

Seán

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# Homework Help: How do you get from one to the other

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