Help Exam 2 Question!!!

[nbhindi]

2007 Methods Exam (CAS) Exam 2 Question 1d. ------> if it's asking for the max surface area wouldn't you sub in the other terminal (i.e. 5(V)^(1/3)/9)?
Thanks guys

[b^3]

2007 Methods Exam (CAS) Exam 2 Question 1d. ------> if it's asking for the max surface area wouldn't you sub in the other terminal (i.e. 5(V)^(1/3)/9)?
Thanks guys

Since the function is concave up for that domain, it wil have a minimum value, i.e. the maximum values will be at the endpoints. So sub in both endpoints and see which on results in the larger value (and so will be the maximum). In this case it is r=(1/10)*v^(1/3) then make sure you find the volume this gives.

[nbhindi]

2007 Methods Exam (CAS) Exam 2 Question 1d. ------> if it's asking for the max surface area wouldn't you sub in the other terminal (i.e. 5(V)^(1/3)/9)?
Thanks guys

Since the function is concave up for that domain, it wil have a minimum value, i.e. the maximum values will be at the endpoints. So sub in both endpoints and see which on results in the larger value (and so will be the maximum). In this case it is r=(1/10)*v^(1/3) then make sure you find the volume this gives.

Cheers mate now I get it 

EDIT: Woooh 100th post!!