Can you see what I have done wrong in this maths question

Watch
Maths Questions
Badges: 8
Rep:
?
#1
Report Thread starter 4 months ago
#1
can you see what I have done wrong and if you know can you point me in the right direction.
Attached files
Last edited by Maths Questions; 4 months ago
0
reply
mqb2766
Badges: 19
Rep:
?
#2
Report 4 months ago
#2
What was your working/explanation?
0
reply
Maths Questions
Badges: 8
Rep:
?
#3
Report Thread starter 4 months ago
#3
(Original post by mqb2766)
What was your working/explanation?
I worked out the gradient of the radius which would be 4-0/-3/0 = -4/3
Then I found the negative reciprocal to work out tangent which is 3/4
I then found the equation of the tangent so:
-4=3/4(-3)+c
-4=-9/4+c
7/4=c
y = 3/4x+7/4
0
reply
mqb2766
Badges: 19
Rep:
?
#4
Report 4 months ago
#4
Y is 4, not -4 when working out c.
0
reply
Maths Questions
Badges: 8
Rep:
?
#5
Report Thread starter 4 months ago
#5
(Original post by mqb2766)
Y is 4, not -4 when working out c.
sorry, i meant to put 4. it would still get 7/4. it was just a typing error
0
reply
mqb2766
Badges: 19
Rep:
?
#6
Report 4 months ago
#6
(Original post by Maths Questions)
sorry, i meant to put 4. it would still get 7/4. it was just a typing error
How?
0
reply
Maths Questions
Badges: 8
Rep:
?
#7
Report Thread starter 4 months ago
#7
(Original post by mqb2766)
How?
I just realized what I have done wrong. Thanks for the help. I was meant to do 4--9/4 to get the answer.
0
reply
mqb2766
Badges: 19
Rep:
?
#8
Report 4 months ago
#8
(Original post by Maths Questions)
I just realized what I have done wrong. Thanks for the help. I was meant to do 4--9/4 to get the answer.
Yes. It's r^2/y = 5^2/4 = 25/4
0
reply
Maths Questions
Badges: 8
Rep:
?
#9
Report Thread starter 4 months ago
#9
(Original post by mqb2766)
Yes. It's r^2/y = 5^2/4 = 25/4
Bye. Thanks for the help
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
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

How are you feeling about starting university this autumn?

Really excited (65)
22.03%
Excited but a bit nervous (133)
45.08%
Not bothered either way (36)
12.2%
I'm really nervous (61)
20.68%

Watched Threads

View All