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Maths
A Level

Integration by parts: Integrate the expression x.ln(x) between 1 and 2.

Let $ denote the integral symbol, as I am limited here by my keyboard.

Recall the formula for integration by parts:

$ u.(dv/dx) dx = uv - $ u(dv/dx) dx

So to find $pi0...

Answered by Rebecca H. Maths tutor
2866 Views

A curve has the equation x^2+2y^2=3x, by differentiating implicitly find dy/dy in terms of x and y.

We shall differentiate each term in the equation with respect to x.

dy/dx (x2) = 2x

dy/dx (2y2) = 4y dy/dx

dy/dx (3x) = 3

So we now have the equation 2x +...

Answered by Kate P. Maths tutor
4073 Views

Solve e^x-6e^-x=1

Multiply everything through by ex   and rearrange so it equals zero
you now have e2x -ex-6=0
It is now similar to a quadratic equation, make the dummy substitu...

Answered by Kishwar I. Maths tutor
9896 Views

Consider a differential equation where dx/dt = -axt. Find an equation for x(t).

Starting from dx/dt = -axt.                                We treat dx and dt as infinitessimal factors of x and t, therefore fundemental mathematical operations still apply. Rearranging the equation to g...

Answered by Cal L. Maths tutor
4110 Views

How do you differentiate a function comprised of two functions multiplied together?

The product rule is useful when you’re dealing with a function comprised of two functions multiplied together. Generally, if you have a function of the form y = f(x)g(x), then the derivative of the functi...

Answered by Elliot G. Maths tutor
8193 Views

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