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Does the function y=x^3+x+(x^2+1)e^x have a horizontal tangent?

We want to determine whether a function has a tangent which is horizontal. To answer the question we need to know what a horizontal tangent to a function means. A tangent to a graph of a function is a line w...
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Answered by Daniel E. • Maths tutor
7020 Views

What is meant by the term 'opportunity cost'

This simply means, 'the next best alternative foregone'. We can explain this by saying if I only had £5 to buy lunch, I could either buy a sandwich or half a pizza. The opportunity cost of me buying a sandwi...
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Answered by KATIE C. • Economics tutor
3803 Views

What is the difference between a codified and uncodified constitution?

The difference between a codified and uncodified constitution is quite simple. Codified means the constitution is written down in a single document. The US constitution is codified. An uncodified constitutio...
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Answered by KATIE C. • Politics tutor
45370 Views

How would you structure a 12 mark question?

There's no set structure as to answer the 12 mark question, but there is an easy way to get you in the hang of it. Firstly you would introduce the question and give some background of the question. Then the ...
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12575 Views

How are some plants able to fix gaseous nitrogen from the atmosphere?

Leguminous plants have nodules on their roots that contain, symbiotic bacteria. These bacteria are capable of turning gaseous nitrogen ultimately to nitrate, which the plant can then use in order to synthesi...
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Answered by Sam C. • Biology tutor
3834 Views