# Need calculus BC help. (in Contests)

## RawrOctober 18 2009 7:57 PM EDT

I will pay CBD per problem for your help in solving some calculus BC problems. If this belongs in FS/WTB i'll pay the fee but it wasn't CB related so I felt contests was sufficient. I will post one problem until it is finished then I will post the next. first:
For the function f(x)= (1/20)x^(2/3) -x, find the local maximums and minimums and inflection points.
I know that max's and min's means the derivative is 0 and for i.p.'s the second derivative is 0, but my numbers are not giving me an answer.

50k for this problem

## AdminTitan[The Sky Forge]October 18 2009 8:00 PM EDT

I hope you mean you want to know how to do this, not just the answers. Otherwise I wouldn't feel comfortable.

## [P]MittOctober 18 2009 8:03 PM EDT

CB has had a long standing unspoken policy (IIRC, it's been awhile) that we do not pay other players to do our homework. Just so you know. I'm not accusing you of this, just be careful.

## RawrOctober 18 2009 8:08 PM EDT

oh really? then I apologize disregard the thread

## RawrOctober 18 2009 8:20 PM EDT

does this mean i can still ask for help though w/o having to pay?

## AdminTitan[The Sky Forge]October 18 2009 8:22 PM EDT

Like I said, I'll help if you don't understand, I'm just not going to do your homework for you, you know what I mean?

## AdminTal Destra[C and S Forgery Lmtd.]October 18 2009 8:29 PM EDT

Why don't you show us your step-by-step and we will show you where/how you went wrong.

## AlmaiskyOctober 18 2009 9:04 PM EDT

"I know that max's and min's means the derivative is 0 and for i.p.'s the second derivative is 0, but my numbers are not giving me an answer. "

You've taken the first and second derivative and set them equal to zero?