Search our library of Maths A Level questions

Top answers

Maths

A Level

solve 4^xe^(7x+5) = 21

ln((4^x)e^(7x+5)) = ln21; apply a natural log on both sides of the equation as an exponential containing e is involved

ln4^x + ln(e^(7x+5)) = ln21; using logarithm rules you can seperate the singl...

Answered by Wahib N. • Maths tutor

3193 Views

How do you integrate y = 4x^3 - 5/x^2?

First we should look at the formula for integrating xⁿ. The integral is (xⁿ⁺¹/ n+1) + C.

Let's break down our equation into two parts.

The integral of 4x
HJ
Answered by Hannah J. • Maths tutor
4689 Views

Find the Total Area between the curve x^3 -3x^2 +2x and the x-axis, when 0 ≤ x ≤ 2.

Initally this question appears to be a straightforward integration that should be carried out between the limits of x=0 and x=2. However if this process is carried out, as strange result is obtained: Area...

Answered by Will K. • Maths tutor

10589 Views

Why do we get cos(x) when we differentiate sin(x)?

If we have an equation for a line, it follows a certain shape when put it on Cartesian axes. If we wish to find the value of the gradient of the graph at a certain coordinate, we can use differentiation t...

Answered by Sophie H. • Maths tutor

5045 Views

Integrate 3 sin(x) + cos(2x)

Here is an example of integration where you would use the chain rule. You would begin by integrating 3sin(x) to get -3cos(x) and then cos(2x) to get 1/2sin(2x). This is because whatever is multiplied by t...

Answered by Dannielle S. • Maths tutor

7725 Views