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I need help with an A-level maths mid-ordinate question. watch

1. I am having trouble understanding how to know what each strip will be on mid-ordinate questions.

If the question wants 5 strips and x is 4 how will I know both the points of each strip and the midpoints ?

http://filestore.aqa.org.uk/subjects...3-QP-JUN13.PDF
2. (Original post by Itsallaconundrum)
I am having trouble understanding how to know what each strip will be on mid-ordinate questions.

If the question wants 5 strips and x is 4 how will I know both the points of each strip and the midpoints ?

http://filestore.aqa.org.uk/subjects...3-QP-JUN13.PDF
You may get a reply more quickly in the Maths forum I've asked for this thread to be moved there.
3. (Original post by Itsallaconundrum)
I am having trouble understanding how to know what each strip will be on mid-ordinate questions.

If the question wants 5 strips and x is 4 how will I know both the points of each strip and the midpoints ?

http://filestore.aqa.org.uk/subjects...3-QP-JUN13.PDF
The way to approach these questions is to find the height/width of the strip first of all. So using the Question 5 as an example, we know the limits of the integral are x=0 and x=4 and we know that n=5. All you do now is calculate the height.

Since this is the full width of the strip, you need to halve it. In this case you get 2/5. This is your first 'x' value. (I recommend drawing a little table at this point and writing in all your x values.)

To get the next x value, add the value you got for the height (in this case 4/5) and continue doing this to get your next value for x. Once you've got 5 values of x, (i.e. 5 ordinates) sub it into the equation to get your respective values of y, then shove it all into the formula.

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