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Hi, When you differentiate (5x+3)^3, which then equals 3(5x+3)^2, how do you get to 15(5x+3)^2? Is it because you multiply it by the derivative of (5x+3), which is 5? But why do you do that? Because I thought you only did that if there was only 1 function of x... Sorry, this is a really...

Thank you! Realised where I was going wrong :)

Hi, I really do need to study for Calculus a little more... How do I find the derivative of 2 over the square root of x? The answer is negative one over the square root of x^3. Thank you!

No worries! I got what you meant :)

Thank you! I worked it out :)

Thanks! Yes, it made sense and I worked it out :)

Hi, I'm pretty sure this is actually quite a simple question, but I just don't know how to answer it: "A function is defined by f(x)=x^2-4x+5. What are the coordinates of the point on y=f(x) which has a gradient of 2?" Thanks.

Aah school is almost coming to an end. It's a bittersweet moment.

Hi! Here's quite a broad question I'm asking all of you: Name any services and/or goods that you wish existed, would like to see more, would like to see improved, or approached in a totally different way from how they're being produced now. Basically, I'd like to know what's something that a...

Hi everyone, I'd really like a few ideas on what you think would be a great topic for a closed ended questionnaire? I think it would be best to get an idea of what people in the wider community are interested in and see what kind of topic ideas I get. :) Also, a topic where I only need to ask...

Ok so I'm a little rusty after the holidays and got this question but don't know what to do: 'The percentage of salt in 1L of water is 10%. 500mL of water is added. What percentage of salt is in the water now?' Thank you!

Re: Girl's generation on David Letterman show + will they become bigger than the beat I was so happy seeing SNSD perform on that show. Music was made to be global, people! It's one of the international languages, so to say that kpop will 'infect' other countries is totally invalid. I'll say...

I'll recommend this program that could be really interesting- I recently watched it. Four Corners- Revolution in the Classroom It shows some of the differences between private and public, and where funding comes from etc. I go to a public school, and I can safely say that many private school...