Search our library of A Level questions

Top answers

All subjects

A Level

The curve C has equation 16y^3 + 9x^2y - 54x = 0 a)Find dy/dx in terms of x and y

16y³ + 9x²y - 54x= 0
a) Differentiate the terms separately dy/dx(16y³ + 9x²y - 54x) = dy/dx(16y³) + dy/dx(9x²y) - dy/dx(54x) ...

Answered by Joseph G. • Maths tutor

4550 Views

What effects aggregate demand and how would it effect the price level of the economy?

Aggregate demand is the total demand in the economy. It is calculated as C+I+G+(X-M), where C is consumption, I is investment, G is government spending, X is exports and M is imports. The value of all is ...

Answered by James T. • Economics tutor

2107 Views

What is the difference between the imperfect and the simple past tense? They are both past tenses, and i am barely even aware of how to use them or what the difference between them is in English, let alone in French!

It is completely natural to have a little difficulty understanding these tenses, given that they are both the past tense, and when you use them in English, it is almost ce...

Answered by Charlie O. • French tutor

2973 Views

How to use the pronoun "en"?

We use en to replace: partitive article ( de/ des/ du/ de la/) + NOUN. It is used to represent: 'some of it/them', 'any of it'. EXAMPLE: Avez-vous du pain? Oui, j'en ai acheté. In this example EN replaces...

Answered by Vivene G. • French tutor

1741 Views