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Find the constant term in the expression (x^2-1/x)^9

This problem uses the binomial expansion formula: (x+y)n= k=0Zn nCk xk yn-k.But lets try to understand where this formula comes...

VY
Answered by Vincent Y. Maths tutor
7250 Views

What is the difference between primary socialisation and secondary socialisation? (4 marks)

Primary socialisation is the process through which a child learns the norms, values, and appropriate behaviours for an individual within wider society. This usually takes place within the family, and can ...

GC
Answered by Georgia C. Sociology tutor
20567 Views

Express 12.5% as a fraction.

To make a percentage into a fraction you divide it by 100. This means 12.5% is 12.5/100. However, when giving fractions as an answer it needs to be done in the simplest form. To do this you need to find t...

TG
Answered by Thanu G. Maths tutor
95786 Views

Differentiate: tan(2x) cos(x)

  1. Explain the product rule: d/dx ( f(x) . g(x) ) = f'(x).g(x) = g'(x) . f (x)
    2. Briefly run through trigonometric derivatives.* cos (x) differentiates to: -sin(...
SD
Answered by Shreyasi D. Maths tutor
6227 Views

Bethan prepared some ethoxyethane (line 6) by reacting ethanol with concentrated sulfuric acid. She used 69g of ethanol (Mr=46) and obtained a 45% yield of ethoxyethane (Mr=74). Calculate the mass of ethoxyethane obtained.

  1. Equation from line 6 is: 2 (ethanol) -------> 1 (ethoxyethane)
    2. The ratio of reaction is 2:1. This is the ratio of moles not mass, i.e., 2 moles of ethanol give 1 ...
SD
2404 Views

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