(2) 算出本函數的期望值、標準差 (5分)

1. Social media are web-based communication tools that allow people to interact with people by sharing information, such as Instagram, YouTube, Facebook, Twitter, TikTok, LinkedIn, etc.. Social media is not all just for entertainment with friends, famous people, and brands one keeps an eye on, the power of social media is the ability to connect and share information with anyone in the world, or with many people simultaneously. With some problems popping up every day, social media can be a challenge to young users, such as spam, cyberbullying, self-image manipulation, information overload, fake news, privacy, emotional disturbance and so on. For this writing task, discuss the negative impacts of social media on youth? (500 words) (70%)

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(2) 算出本函數的期望值、標準差 (5分)

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