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How do I use the product rule for differentiation?

The product rule is a rule for differentiating products of expressions, i.e. 2 expressions multiplied together. The rule is: if y=A B, then dy/dx=A dB/dx +B*dA/dx. This can be remembered as "Write down ...
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Answered by Thomas E. • Maths tutor
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How do I approach an essay question?

The layout of your essay is crucial. Make sure your ideas are clear and explicit - your teacher shouldn't have to decode what you mean! Use correct grammar and make your vocabulary interesting, using words s...
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Answered by Caitlin B. • History tutor
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What is Standard form? And when can I use it?

Standard form, also referred to as standard index form is a method of writing really big and really small numbers. It uses powers of 10 to express its size.Standard form is used all the time in science and e...
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Answered by Ceri L. • Maths tutor
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The number of uniform spherical shots that can be made from a given mass of lead varies inversely to the cube of the radius. When the radius is 1mm the number of shots made is 2744. How many shots of radius 1.4mm can be made from the same mass.

The key to long questions like these is picking out the key information quickly. We have 2 pieces of information we are interested in, the number of shots and the radius of each shot, so let's assign them a ...
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Answered by Joshua J. • Maths tutor
4954 Views

Assess the role of each of the following in causing the First World War (1914–1918): the desire for revenge; economic motives; Balkan nationalism.

Assess the role of each of the following in causing the First World War (1914–1918): the desire for revenge; economic motives; Balkan nationalism.Questions using, 'assess' are not looking for a one sided arg...
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Answered by Jenevieve T. • History tutor
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