Can anyone provide examples of when we would write to inform, request or persuade, or build goodwill in the business world?

You write to "x" when you want to "x" someone.

For example, you write to "persuade" when you want to "persuade" someone. It's that simple.

Wheres the example?

In your brain. Use it.

Here are some sites related to persuasion, written or otherwise:

http://www.members.cox.net/dagershaw/lol/Persuasion.html
http://www.members.cox.net/dagershaw/lol/QuestionFrame.html
http://www.members.cox.net/dagershaw/lol/MeanNewsMedia.html
http://www.members.cox.net/dagershaw/lol/MediaPower.html
http://www.members.cox.net/dagershaw/lol/MediaMakeMost.html
http://www.members.cox.net/dagershaw/lol/InfluenceAntecedents.html
http://www.members.cox.net/dagershaw/lol/InfluenceMorePrinciples.html
http://www.members.cox.net/dagershaw/lol/InfluenceStillMore.html

I hope you can generalize some of these examples to the business world. Thanks for asking.

Certainly! Here are some examples of when you would write to inform, request, persuade, or build goodwill in the business world:

1. Writing to inform: You would write to inform your clients about a new product or service your company is offering, or to provide updates on changes in your business operations.

2. Writing to request: You would write a formal letter or email to request a meeting with a potential client, or to ask for additional information or clarification from a supplier or business partner.

3. Writing to persuade: You would write a persuasive sales letter or email to convince potential customers why they should choose your product over competitors, or to persuade investors to fund your business venture.

4. Writing to build goodwill: You would write a thank-you note or email to express gratitude to a client or customer for their business, or to acknowledge the efforts of your employees for their hard work and dedication.

These are just a few examples, and the specific situations may vary depending on the industry and context. Remember to use a professional tone and tailor your message to the intended audience when writing in the business world.