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This was a GCSE question in 2015. There are n sweets in a bag. 6 of them are orange, the rest are yellow. Hanna takes a random sweet from the bag and eats it. She then takes another random sweet and eats ...

This can include: advertising, complementary goods, amount of substitutes avaible, income and quality. Just to name a few. 

You would use the product rule. uv'=uv- u'vdx. In this case we would allocate u= ln x and v'=1 so u'=1/x and v=x so uv=xlnx whilst u'v=x/x=1 so we would have xln(x) -1dx. Next we would get xln(x)-x +c

The mutliplier effect is how much does an intial injection affect GDP. So for example if the Government spent £1bn on transport projects and it increased GDP by £2bn then the mutliplier effect would be 2....

Quand j'étais plus jeune, je jouais de la guitare. (Imperfect, a countinuous action in the past) When I was younger, I used to play the guitar. Hier, je suis allée à la mer. (Passé composé, a completed ac...