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Solve 8^x + 4 = 4^x + 2^(x+2).

Firstly, we want to notice that this question only involves powers of 2^x, ie. (2^x)^3 + 4 = (2^x)^2 + 4(2^x) so we can use the substitution u = 2^x to give u^3 - u^2 - 4u + 4 = 0 The problem (at least at th...
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Answered by Sachin A. • MAT tutor
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Perfect competition theory is based on very unrealistic assumptions. Evaluate whether such a theory is useful in explaining the behaviour of real world firms.

The main assumptions of the model of perfect competition are: the number of selling firms tends to infinite, both sellers and buyers are price takers (i.e. they cannot influence the market price), identical ...
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Answered by Konrad V. • Economics tutor
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Heutzutage sind die Kinder für die jungen Familien keine Priorität mehr. Warum ist es so?

Einerseits leben wir in einer stark industrialisierten Welt, wo jeder seine eigenen Berufsziele verwirklichen könne. Die Frauen werden immer unabhängiger und brauchen keine Unterstützung z.B. von den Männern...
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Answered by Nadezhda B. • German tutor
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How are root hair cells specialised to carry out their function?

The role of root hair cells is to absorb water and mineral ions. Therefore they have a large surface area to increase the rate of water absorption. Root hair cells also have a large amount of mitochondria wh...
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Answered by Iona M. • Biology tutor
41700 Views

Compare a eukaryotic cell with a prokaryotic cell

Both the eukaryotic and prokaryotic cells have a cell surface membrane and contain cytoplasm and ribosomes. However, eukaryotic cells contain membrane bound organelles, such as mitochondria, nuclei, endoplas...
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Answered by Rebecca O. • Biology tutor
4268 Views