Search our library of A Level questions

Top answers

All subjects

A Level

Why is a monopoly inefficient?

Monopolistic markets do not meet the criteria for the most important kind of social efficiency - allocative efficiency. If the market is allocatively efficient, firms will be producing at a point where...

Answered by Theo C. • Economics tutor

17668 Views

How and when do you use integration by parts?

Integration by parts is a method of integration used when you are attempting to integrate a function which is the product of two functions. If the two products can be expanded there is usually an easier w...

Answered by Ashley P. • Maths tutor

8070 Views

How do you use the subjunctive mood?

In the German language there are two types of subjunctive: the Konjuntiv I and Konjunctiv II. The first form is used in reported speech, in order to report something that may or may not be true. The Ko...

Answered by Rhea C. • German tutor

2986 Views

How to integrate e^(5x) between the limits 0 and 1.

Note that by the chain rule if the function y is such that y(x)=f(g(x)), where f and g are functions, then the derivative of y wrt x is given by

dy/dx = (df/dg)*(dg/dx).

Answered by Max S. • Maths tutor

12260 Views

What is differentiation and how is it done?

Differentation is a type of calculus that allows us to work out the rate of change. For example, if we have a straight line graph such as y=2x, we know that the gradient of the line is 2. If we take a ...

Answered by Megan P. • Maths tutor

11348 Views