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# Maths C2 Integration help watch

1. Not sure how to do this, can someone please explain it to me, you dont have to work out an answer just tell me how to go about working it out
2. (Original post by Mo_maths)

Not sure how to do this, can someone please explain it to me, you dont have to work out an answer just tell me how to go about working it out
Are you saying that you cannot use the trapezium rule
3. (Original post by TenOfThem)
Are you saying that you cannot use the trapezium rule
not at all, but im not sure what to do with the integral to get a curve so i can use that rule
4. (Original post by Mo_maths)
not at all, but im not sure what to do with the integral to get a curve so i can use that rule
You have lost me

Can you explain what you do not understand?

You have 0-4

So the strips are 0-1, 1-2, 2-3, 3-4 if you have 4 strips

Or 0-0.5, 0.5-1 etc for 8 strips

Is that what you did not get?
5. (Original post by TenOfThem)
You have lost me

Can you explain what you do not understand?

You have 0-4

So the strips are 0-1, 1-2, 2-3, 3-4 if you have 4 strips

Or 0-0.5, 0.5-1 etc for 8 strips

Is that what you did not get?
where do you go from there to work out the area
6. (Original post by Mo_maths)
where do you go from there to work out the area
You use the trapezium rule

You have your x values
So you find your y values

you have h

all this just plugs into the formula
7. (Original post by TenOfThem)
You use the trapezium rule

You have your x values
So you find your y values

you have h

all this just plugs into the formula
so do i sub the x values in the integral root(1+x^2) dx???
8. (Original post by Mo_maths)
so do i sub the x values in the integral root(1+x^2) dx???
Again, I do not really know what you mean

Which question are you doing

If the first then you just use the trapezium rule

If the second you use the trapezium rule and integrate then compare the answers

Can you show me a question where you can do the trapezium rule so I can try and understand your confusion
9. (Original post by TenOfThem)
Again, I do not really know what you mean

Which question are you doing

If the first then you just use the trapezium rule

If the second you use the trapezium rule and integrate then compare the answers

Can you show me a question where you can do the trapezium rule so I can try and understand your confusion
lets just focus on q9, ok so i know how wide the gaps are, im given that equation thing i need to know the length of each strip, what do i do to work out that.
hight/2(y1+(2*y2)+(2*y3)+(2*y4)+(2*y5) +y5)
what are my y numbers
10. (Original post by Mo_maths)
lets just focus on q9, ok so i know how wide the gaps are, im given that equation thing i need to know the length of each strip, what do i do to work out that.
hight/2(y1+(2*y2)+(2*y3)+(2*y4)+(2*y5) +y5)
what are my y numbers
... was that the bit you did not get

And you have the x values
11. (Original post by TenOfThem)
... was that the bit you did not get

And you have the x values
that question is silly, why dont they just say an equation of a curve is this. that scrolly thing confused me cos i though i had i integrate it
12. (Original post by Mo_maths)
that question is silly, why dont they just say an equation of a curve is this. that scrolly thing confused me cos i though i had i integrate it
The question is asking you to estimate the integral to give the area

You really ought to know that the area is given by
13. (Original post by TenOfThem)
The question is asking you to estimate the integral to give the area

You really ought to know that the area is given by
I know that, but i think were just confusing each other here, thanks for your help I think I get it now

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