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Differentiate y = x*cos(2x)

cos(2x) - 2x*sin(2x)
PM
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Evaluate log_6(12)+(1/3)log_6(27)

Answering this question requires knowledge of the logarithm rules. Mainly how to manipulate logarithms.Firstly, notice that the multiplication in front of log_6(27) can be moved to be the power of the 27. Ch...
CD
Answered by Christine D. • Maths tutor
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How can I apply the issues and debates knowledge that we learn to other fields of psychology?

In an A-level psychology class, one of the main focuses is teaching students to evaluate the models they are presented with. This can be difficult as up until A-level students are presented with any scientif...
CW
Answered by Cam W. • Psychology tutor
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n is an integer greater than 1. Prove algebraically that n^2 – 2 – (n – 2)^2 is always an even number.

1) Expand the brackets: (n-2) 2 = (n-2)(n-2) = n 2 - 2n - 2n +4 = n 2 - 4n + 4 2) Substitute this into the original expression: n 2 - 2 - (n 2 - 4n +4) = n 2 - 2 - n 2 + 4n - 4 = 4n - 6 3) Reduce this: 4n - ...
JM
Answered by James M. • Maths tutor
5793 Views

Why might expansionary demand side policies not always be effective in promoting economic growth?

Expansionary demand side policies focus on increasing Consumption and Investment within the economy. By increasing these components of real GDP, the economy will normally increase its' output and decrease it...
CH
Answered by Charlie H. • Economics tutor
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