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Find the maximum or minimum value of the function: y = 6x^2 + 4x + 2

The easiest way to solve this problem is by using differentiation . dy/dx = (6x^2 + 4x + 2)/dx dy/dx = 6 2 x^1 + 4 1 x^0 + 0 dy/dx = 12x + 4 When you set the derivative equal to zero you find a point on the ...
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Answered by Harry C. • Maths tutor
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What's the difference between direct and indirect taxation

Direct taxes are paid to the government straight from the individual or group taxpayer. E.g income tax (comes straight from the individuals' income) or corporation tax (comes straight from the firm). Indirec...
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Answered by Colm M. • Economics tutor
17411 Views

Do you need to quote other historians in exams?

In most A Level mark schemes, this is not a requirement. Examiners are looking for you to demonstrate your understanding of key historical concepts and ideas, show that you understand the significance of a q...
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Answered by Colm M. • History tutor
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What's the difference between a histogram and a bar chart?

A bar-chart is a graph where the height of the bar measures the frequency of a particular category which that bar represents. For a histogram, however, the height is the frequency density. This means that th...
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Answered by Colm M. • Maths tutor
12884 Views

What are "x" and "y" and why are they used?

The letters "x" and "y", or any other similar letter in an equation, are examples of unknown variables . What this means is that we don't know their value, and often the aim of the game i...
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Answered by Colm M. • Maths tutor
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