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# maths help pls watch

1. i am so stuck on this question
i've done questions like this before but it would say with limits

---Moved to Maths---

2. I am talking about B NOT A
3. (Original post by mervin101)
RDKGames
The trapezium rule says that where and is the amount of strips.

With this question, it is asking you to use the table to compute the approximation and you can see that here.

Then

and

and so on...

What is confusing?
4. (Original post by RDKGames)
The trapezium rule says that where and is the amount of strips.

With this question, it is asking you to use the table to compute the approximation and you can see that here.

Then

and

and so on...

What is confusing?
what is n?
i dont know how h = 0.5
4-1/ n
5. (Original post by mervin101)
what is n?
i dont know how h = 0.5
4-1/ n
is the strip width, so the fixed change in . Which is 0.5. Just look at the x-values from the table, they all change by 0.5 as you count on.
6. (Original post by RDKGames)
is the strip width, so the fixed change in . Which is 0.5. Just look at the x-values from the table, they all change by 0.5 as you count on.
h= b-a divided by n

b-a = 3 (4-1) now i divide by n to get h

i'm still confused about n
i understand h is the strip width

do i rearrange or am i missing something
7. (Original post by mervin101)
h= b-a divided by n

b-a = 3 (4-1) now i divide by n to get h

i'm still confused about n
i understand h is the strip width

do i rearrange or am i missing something
You don't need to find . You only need it to find in these types of questions but you have from the get-go...
8. (Original post by RDKGames)
You don't need to find . You only need it to find in these types of questions but you have from the get-go...
can you use this formula?

width of strip/2 x 1st height + sum of middle heights + last height?
9. (Original post by mervin101)
can you use this formula?

width of strip/2 x 1st height + sum of middle heights + last height?
No because it's not quite the same as

(half the strip width) multiplied by (1st height + last height + 2 lots of the sum of the middle heights)

if you want the formula in words.

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