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What is a limit

a limit is concerned with how a funciton behaves very close to a certain point. it is written simply as limf(x) = A, x>a this means as x approaches a, f(x) equals A
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Answered by Tom H. • Maths tutor
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How does the exchange rate mechanism affect aggregate demand in the UK?

The exchange rate is defined as the value of one currency against another. Aggregate demand (AD) comprises of consumption, government spending, investment and exports minus imports. A fall in the value of a ...
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Answered by Tom H. • Economics tutor
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How to write a 'One effect question?'

GSCE examiners want to see a progression of thought and evidence of argument within these questions. Therefore the best way to tackle this would be to use connective words such as 'the fact that'.......'mean...
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Answered by Marius P. • History tutor
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Describe the formation of an Oxbow lake

An Oxbow lake is a middle-course feature of a river which is caused water eroding the corner of a meander, resulting in an isolated corner containing a body of water. This happens as the velocity of the wate...
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Answered by Marius P. • Geography tutor
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Fully simplify the expression: 4 / (sqrt(8) + 4)

Notice that the square root of 8 can be simplified: 4 / (sqrt(4) * sqrt(2) + 4) = 4 / (2 * sqrt(2) + 4) Divide top and bottom of the fraction by two: 2 / (sqrt(2) + 2) Rationalise the denominator: (2 / (sqrt...
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Answered by Oliver M. • Maths tutor
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