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How do you integrate (x/(x+1)) dx without using substitution.

A tricky question which is actually really simple if you know the technique and will save a lot of time during the exam. The method is to simply add 1 and minus one to the numerator. so the integral becomes ...
Answered by • Maths tutor
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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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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...
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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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Using Angola as an example, evaluate the view that MNCs play a positive role in the development of LEDCs. (25 marks)

Structure: Definition and IntroductionWhat is a Multi National Corporation? Define: Less Economically Developed Country --> characteristics (brief)First Point: Analysis, Application, Evaluation Investment...
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Answered by Nasya M. • Economics tutor
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