# A level Maths helpWatch

#1
Can someone help me with this question please??

so for i. I got k=90
for ii. I got y=5x+30 but I think it might be wrong
I'm not sure how to do iii - is it just differentiation and stationary points?

https://imgur.com/a/sshSEo3
Last edited by Fazzy_77; 4 weeks ago
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4 weeks ago
#2
Your attachment doesn't seem to work.
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4 weeks ago
#3
(Original post by Fazzy_77)
Can someone help me with this question please??

so for i. I got k=90
for ii. I got y=5x+30 but I think it might be wrong
I'm not sure how to do iii - is it just differentiation and stationary points?
Use www.imgur.com to upload attachments. Never use the site itself.
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#4
(Original post by JaredzzC)
Your attachment doesn't seem to work.
edited it. does it work now?
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#5
(Original post by RDKGames)
Use www.imgur.com to upload attachments. Never use the site itself.
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4 weeks ago
#6
(Original post by Fazzy_77)
edited it. does it work now?
Yep. Your parts (i) and (ii) are correct. Part (iii) is to do with finding the stationary points, so differentiation is involved.

Last part is to do with finding where the curve obtains its maximum/minimum gradient.
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#7
(Original post by RDKGames)
Yep. Your parts (i) and (ii) are correct. Part (iii) is to do with finding the stationary points, so differentiation is involved.

Last part is to do with finding where the curve obtains its maximum/minimum gradient.
how should I go about solving iv?
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4 weeks ago
#8
(Original post by Fazzy_77)
how should I go about solving iv?
Use differentiation to find the max/min of
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#9
(Original post by RDKGames)
Use differentiation to find the max/min of
Thank you so much!
prsom
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