Top answers

Find the gradient of y=6x^3+2x^2 at (1,1)

In order to find the gradient of the curve at (1,1), we must first differentiate the equation of the curve. To do this, multiply the coefficient of x by the power of that same x. Then subtract one from the p...
BB
Answered by Ben B. • Maths tutor
5702 Views

Explain how interest rates could be used to stimulate a rise in inflation.

Interest rates, which represent the cost of borrowing money and the returns from saving it, are used by central banks to control the level of inflation. If the central bank wants to increase inflation, it wi...
BB
Answered by Ben B. • Economics tutor
4009 Views

A is the point with coordinates (1, 3) B is the point with coordinates (–2, –1) The line L has equation 3y = 4 – 2x Is line L parallel to AB?

No it is not parallel, here is the reasoning. First we work out the gradient of the line AB. We do this by using the gradient formula (Y2-Y1)/(X2-X1). Our points are A=(1,3) rewritten as (X1,Y1) and B=(-2,-1...
EL
Answered by Emily L. • Maths tutor
13764 Views

Show that (4+√12)(5-√3)= 14+6√3

First, expand out the brackets. Initially, this will give you 20 - 4√3 + 5√12 - √36. √36 is the equivalent of 6, now giving up 20 - 4√3 + 5√12 - 6. We can combine the 20 and the 6 to give us 14 - 4√3 + 5√12....
LH
Answered by Lucy H. • Maths tutor
10052 Views

Factorise x²+5x+6.

You need to find two numbers that multiply to make 6 and add to make 5. Usually it's easier to find a correct multiplication and check that it satisfies the addition. Here the options are 6&1 or 2&3,...
ED
Answered by Elliot D. • Maths tutor
12961 Views