Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » sci.math.* » sci.math.independent

Topic: Help Needed in math
Replies: 25   Last Post: May 2, 2014 6:01 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Karl-Olav Nyberg

Posts: 385
Registered: 12/6/04
Re: Help Needed in math
Posted: Apr 29, 2014 6:29 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

On Wednesday, April 30, 2014 12:07:11 AM UTC+2, Peter Percival wrote:
> quasi wrote:
>

> > punisher wrote:
>
> >>
>
> >> Can someone help me solve this
>
> >>
>
> >> Find the largest values of the integer a for which ax^2-5x-3 is
>
> >> negative for all values of x.
>
> >
>
> > Is it homework?
>
> >
>
> > I'll give a few hints:
>
> >
>
> > (1) Can the required value of a be positive? Can it be zero?
>
> >
>
> > (2) Can you find the vertex coordinates in terms of a?
>
> >
>
> > (3) As an alternative to (2), find the discriminant in
>
> > terms of a. How can it help?
>
> >
>
> > quasi
>
>
>
> A more general hint: if it's homework then there is a good chance that
>
> what was done most recently in the classroom or read most recently in
>
> the textbook will be relevant. So if one is stumped by a homework
>
> question look first at what was (supposed to be) most recently learned.
>
>
>
> (Mind you, if I were a teacher I'd always throw in a few homework
>
> questions relevant to what I taught six months previously...)
>
>
>
> --
>
> ...if someone seduced my daughter it would be damaging and horrifying
>
> but not fatal. She would recover, marry and have lots of children...
>
> On the other hand, if some elderly, or not so elderly, schoolmaster
>
> seduced one of my sons and taught him to be a homosexual, he would ruin
>
> him for life. That is the fundamental distinction. -- Lord Longford


An exellent advice!



Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.