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How many quotations do I have to know for the exam and how should I use them?

There's no set number of quotations that you need to know for the exam and, when it comes to learning them, less is definitely more. It's more important to have a small collection of quotations that you can ...
SE
5446 Views

How and why does price elasticity change along a demand curve?

Price elasticity of demand is defined as the proportional change in demand to a change in price. If the response in demand is more than proportional to the price change, demand is elastic. A less than propor...
AW
Answered by Andrea W. • Economics tutor
35665 Views

Describe briefly the nature of metallic bonding and use this to explain why metals are malleable (can be hammered into shape) and conduct electricity

Metallic bonding occurs as a result of the electrical attraction forces between the protons in the nuclei of the metal species and the delocalised electrons (which form a sea of electrons surrounding the arr...
MA
15011 Views

Integral of 1/(x^3 + 2x^2 -x - 2)

Factorise denominator using the factor theorem giving - 1/(x+1)(x+2)(x-1) Use partial fractions to turn this into an easier form to integrate giving - 1/3(x+2) + 1/6(x-1) - 1/2(x+1) using integral 1/x = ln(x...
MO
Answered by Mojowo O. • Maths tutor
10083 Views

A curve has the equation 2x^2 + xy - y^2 +18 = 0. (1) Find the coordinates of the points where the tangent to the curve is parallel to the x-axis.

Firstly notice that the coordinates of the points where the tangent to the curve is parallel to the x-axis are precisely the points where the rate of change of y with respect to x is not changing. That is, w...
OL
Answered by Oliver L. • Maths tutor
9526 Views