maths y-coordinate of minimum Watch

mikaelalrc
Badges: 8
Rep:
?
#1
Report Thread starter 2 weeks ago
#1
Hey guys,
so I'm stuck, any help please???
0
reply
Muttley79
Badges: 19
Rep:
?
#2
Report 2 weeks ago
#2
(Original post by mikaelalrc)
Hey guys,
so I'm stuck, any help please???
Could you post the question?
0
reply
mikaelalrc
Badges: 8
Rep:
?
#3
Report Thread starter 2 weeks ago
#3
Oh ye messed up, sorry!

g(x) = x^3 + kx^2 - 15x + 5
g'(x) = 3x^2 + 2kx - 15
tangent to the graph of y = g(x) at x=2 is parallel to the line y= 21x + 7
m = 21
k = 6
g'(-1) = -24
g is decreasing at x= -24 as it is negative

Find the y-coordinate of the local minimum.

(Original post by Muttley79)
Could you post the question?
0
reply
Muttley79
Badges: 19
Rep:
?
#4
Report 2 weeks ago
#4
(Original post by mikaelalrc)
Oh ye messed up, sorry!

g(x) = x^3 + kx^2 - 15x + 5
g'(x) = 3x^2 + 2kx - 15
tangent to the graph of y = g(x) at x=2 is parallel to the line y= 21x + 7
m = 21
k = 6
g'(-1) = -24
g is decreasing at x= -24 as it is negative

Find the y-coordinate of the local minimum.
Isn't there another thread on this? I think you've sorted it now.
0
reply
mikaelalrc
Badges: 8
Rep:
?
#5
Report Thread starter 2 weeks ago
#5
kind of, yes. thank you anyway!
(Original post by Muttley79)
Isn't there another thread on this? I think you've sorted it now.
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

  • Keele University
    Postgraduate Open Afternoon Postgraduate
    Thu, 27 Jun '19
  • Birkbeck, University of London
    Undergraduate Open Day - Bloomsbury Undergraduate
    Thu, 27 Jun '19
  • University of Birmingham
    Undergraduate Open Day Undergraduate
    Fri, 28 Jun '19

What was the hardest A-level paper of 2019?

Edexcel Maths paper 1 (50)
23.36%
Edexcel Maths paper 2 (71)
33.18%
AQA Chemistry Paper 2 (43)
20.09%
Edexcel Maths Paper 3 (18)
8.41%
AQA Physics Paper 3 (32)
14.95%

Watched Threads

View All