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This last question on any French GCSE exam is about putting into use all of the tricks you have learnt over the last two years. I recommend looking over the marking scheme before the exam to know exactly ...

We will solve the integral by part. We know the formula for integration by parts: ∫ f(x)'g(x)dx=f(x)g(x)-∫f(x)g(x)'dx (1). We know that: (arcsin (x))'=1/sqrt(1-x^2). So w...

=(x-5)(x+5)

In order to answer, one should consider the benefits of profit maximisation. These may include: satisfying shareholders, using money for savings in order to stay afloat, reinvesting profits into technolog...

Firstly, to identify butanoic acid, adding a small amount of NaHCO₃ or any metal carbonates would allow effervescence tobe produced. The effervescence produced is CO₂ . To make sure ...