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Differentiate 3x^(3) + 7x^(2) -4x

Using the formula for differentiation: if y=a x N then dy/dx= N a*x N-1 apply this to each term in the equation given; first term: dy/dx= 9x 2 second term: dy/dx= 14xthird term: dy/dx= - 4Combining all three...
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Answered by Michelle W. • Maths tutor
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How do I choose a question in the exam?

First of all you need to break down the wording of each question and find key words (e.g. in a question asking to discuss the 'unsayable' this is the key word that needs to be addressed) and pick out the one...
Answered by • English tutor
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Express (3-5x)/(x+3)^2 in the form A/(x+3) + B/(x+3)^2

A needs to be multiplied up by x+3 to make the fraction have the same in denominator as the other expressions. Then you need to equate the numerators. 3 - 5x = A(x+3) + B You can gain two simultaneous equati...
Answered by • Maths tutor
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What musical features are found in 'And the glory of the Lord' by Handel?

'And the glory of the Lord' from the oratorio Messiah by G. F. Handel is a chorus from the Baroque era for SATB choir and violins, viola, and continuo bass (cello). The time signature is in 3/4 and the tempo...
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Answered by Julia S. • Music tutor
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How does a simple reflex work?

A pain stimulus, for example, pressure from a pin, is sensed by a receptor, for example, pacinian corpuscle in the skin of the fingertip.This causes a change in shape of the receptor, so sodium ions diffuse ...
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Answered by Tara S. • Biology tutor
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