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Can you give an example of using the chain rule for differentiation? Example: Let y=(6 + 2x + 2x^2)^3, find dy/dx.

The chain rule is given by dy/dx= (dy/du)(du/dx). If we set u=6+2x+2x 2 then, y=u 3 thus, dy/dx=(3u 2 )(2+4x) = (3(6+2x+2x 2 ) 2 )(2+4x). Example does not ask to simplify expression or evaluate at any partic...
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Answered by Anthony H. • Maths tutor
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Describe the movement of ions, and changes in potential, across the nerve cell membrane during depolarisation and repolarisation.

During depolarisation, sodium ions move into the cell, resulting in the membrane potential rising from -70 millivolts (mV) to +40mV.During repolarisation, potassium ions move out of the cell, and the membran...
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Answered by William P. • Biology tutor
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What are the advantages of saltatory conduction?

· The myelin sheath means that action potentials can occur only at the gaps between the Schwann cells that make up the myelin sheath.· Effectively the action potential jumps from one node of Ranvier to the n...
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Answered by Natalia S. • Biology tutor
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What is saltatory conduction?

· Myelin sheath is an insulating layer of fatty material, composed of Schwann cells wrapped tightly around the neurone.· Sodium and potassium ions cannot diffuse through this fatty layer.· In between the Sch...
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Answered by Natalia S. • Biology tutor
7650 Views

How do I achieve the correct balance of assessment objectives in my essay?

The most important thing before trying to apply the AO's to your essay is to make sure you have an in-depth understanding of what each objective looks like in your writing. In your last essay, use highlighte...
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Answered by Skye F. • English tutor
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