c2 past paper question-trapezium rule and area under curve? Watch

d_aan
Badges: 1
Rep:
?
#1
Report Thread starter 7 years ago
#1
Hello everybody, I'm a bit stuck on a particular part of this maths question, I was just wondering if anybody could help me out. It's question 6 of the January 2011 paper, I can do 6a and 6b pretty easily(the table and then trapezium equation) but I'm not sure on how you work out part C?

I know you have to do 1/2xBxH then you get the figure from b(0.3175) then minus it from the area of the triangle to find the area "S" The mark scheme got the height as 0.2, though I don't know how?

I know the base is "1" because (3-2) but I don't know how to work out the height, any assistance would be deeply appreciated! Thanks



Here is the link to the mark scheme as well it's q6.C

http://www.kingsleyschoolbideford.co..._20110309.aspx
0
reply
vc94
Badges: 10
Rep:
?
#2
Report 7 years ago
#2
The height of the triangle is the y-value corresponding to x=3...so look in the given table!
1
reply
In One Ear
Badges: 17
Rep:
?
#3
Report 7 years ago
#3
Simple, if you take 1 to be the base, then the heigh is the y coordinate of B (3,y).

Sub in x=3 into your equation.



y = \dfrac {5}{3x^2-2}









y = \dfrac {5}{3 \times 9 -2}









y = \dfrac {5}{25}













y = 0.2
1
reply
d_aan
Badges: 1
Rep:
?
#4
Report Thread starter 7 years ago
#4
(Original post by vc94)
The height of the triangle is the y-value corresponding to x=3...so look in the given table!
(Original post by In One Ear)
Simple, if you take 1 to be the base, then the heigh is the y coordinate of B (3,y).

Sub in x=3 into your equation.



y = \dfrac {5}{3x^2-2}









y = \dfrac {5}{3 \times 9 -2}









y = \dfrac {5}{25}













y = 0.2
Thank you both, feel a bit silly now that I couldn't find it before hand, but again thank you
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Cardiff Metropolitan University
    Undergraduate Open Day - Llandaff Campus Undergraduate
    Sat, 27 Apr '19
  • University of East Anglia
    Could you inspire the next generation? Find out more about becoming a Primary teacher with UEA… Postgraduate
    Sat, 27 Apr '19
  • Anglia Ruskin University
    Health, Education, Medicine and Social Care; Arts, Humanities and Social Sciences; Business and Law; Science and Engineering Undergraduate
    Sat, 27 Apr '19

Have you registered to vote?

Yes! (551)
37.84%
No - but I will (114)
7.83%
No - I don't want to (102)
7.01%
No - I can't vote (<18, not in UK, etc) (689)
47.32%

Watched Threads

View All
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise