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How do I work out the nth term?

The nth term falls into the topic of linear sequences . A linear sequence is a set of numbers (such as "1, 2, 3, 4, ...") that are connected by a rule , which applies to every number in the sequenc...
LB
Answered by Luke B. • Maths tutor
193438 Views

Solve the simultaneous equations: 3x+2y=4 and 4x+5y=17

To solve this equation we need to make it so the x's or the y's of each equation are equal. To do this we need to multiply one or both equations so we can take or add one of the equations to the other. We ar...
AH
Answered by Arron H. • Maths tutor
18317 Views

Why is atrial repolarisation not present on an ECG yet ventricular repolarisation is?

This is because the QRS complex on the ECG (which represents the Ventricular depolarisation) is at such a high magnitude, it masks the electrical signals that occur due to atrial repolarisation as these two ...
SG
4099 Views

A rectangle has an area of 20cm^2. Its length and width are enlarged by a factor of 3. Find the area of the enlarged rectangle.

I'd start by drawing out any rectangle with an area of 20cm^2 and labelling the length and width. Any correct combination will do (i.e. 2 X 10, 4 X 5, 20 X 1 etc.). In this example, I will use 4 X 5 Then mul...
DS
Answered by Daniel S. • Maths tutor
17424 Views

using the substitution u=6-x^2 integrate (x^3)/(6-x^2)^1/2 with respect to x, between 1 and 2

First we calculate du/dx = -2x and rearrange to get dx as the subject, dx=du/(-2x). Now we change the limits of integration because we are now integrating with respect to u. So the bottom limit will be u(1) ...
DB
Answered by Daniel B. • Maths tutor
5554 Views