Top answers

Differentiate y = 7(x)^2 + cos(x)sin(x)

This question uses a combination of standard differentiation and the product rule. The second part of the equation cos(x)sin(x) is the product of two funtions so the product rule must be used. Product rule: ...
EC
Answered by Edward C. • Maths tutor
4197 Views

What is the difference between passé composé and imparfait?

Both of these tenses are used to denote events that occured in the past, but they are troublesome for several reasons and used in broadly different contexts. First, it is important to note that the imperfect...
MA
Answered by Manon A. • French tutor
3672 Views

If mpc = 0.6, what will be the final change in National Income arising from an initial increase in Investment of £200m?

In this case, mpc is the Marginal Propensity to Consume, which is a value between 0 and 1 representing the proportion spent on consumption of an extra unit of income received by a consumer. It is used formul...
DB
Answered by Daniel B. • Economics tutor
19145 Views

Find the set of values of x for which x(x-4) > 12

When solving this quadratic inequality, we should use a three-step approach. The first step is to reformat the inequality to put one side equal to zero, which is the standard format of a quadratic equation. ...
DB
Answered by Daniel B. • Maths tutor
14676 Views

Simplify (5-2√3)/(√3-1) giving your answer in the form p +q√3, where p and q are rational numbers

The trick here is to use a technique called the difference of squares. If we multiply the top and bottom of the fraction by the conjugate* of the denominator, we can remove any square root terms from the den...
AW
Answered by A W. • Maths tutor
21071 Views