Results 1 to 5 of 5

Math Help - what is the minimum value of a^2+6a-7

  1. #1
    Junior Member
    Joined
    Oct 2013
    From
    nevada
    Posts
    58

    what is the minimum value of a^2+6a-7

    what is the minimum value of a^2+6a-7
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    Oct 2013
    From
    Singapore
    Posts
    57
    Thanks
    9

    Re: what is the minimum value of a^2+6a-7

    set it to zero and solve for a
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Jun 2010
    Posts
    111

    Re: what is the minimum value of a^2+6a-7

    Quote Originally Posted by vegasgunner View Post
    what is the minimum value of a^2+6a-7
    a=1 and a=7 so 1 is the answer
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Junior Member
    Joined
    Oct 2013
    From
    Singapore
    Posts
    57
    Thanks
    9

    Re: what is the minimum value of a^2+6a-7

    Quote Originally Posted by haftakhan View Post
    a=1 and a=7 so 1 is the answer
    oi. He didn't show any workings, so I don't think it's a good idea just to give an answer like that.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    MHF Contributor
    Prove It's Avatar
    Joined
    Aug 2008
    Posts
    11,404
    Thanks
    1293

    Re: what is the minimum value of a^2+6a-7

    Quote Originally Posted by LimpSpider View Post
    set it to zero and solve for a
    No, you need to set the DERIVATIVE equal to 0 and solve for a. You also need to give an argument as to WHY it is a minimum.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Minimum of n?
    Posted in the New Users Forum
    Replies: 1
    Last Post: March 28th 2013, 06:36 AM
  2. minimum value
    Posted in the Calculus Forum
    Replies: 2
    Last Post: January 7th 2012, 10:47 AM
  3. Replies: 3
    Last Post: August 21st 2011, 12:12 PM
  4. minimum value
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: October 4th 2009, 05:38 AM
  5. minimum value
    Posted in the Calculus Forum
    Replies: 3
    Last Post: October 29th 2008, 04:52 PM

Search Tags


/mathhelpforum @mathhelpforum