Results 1 to 4 of 4

Thread: Exponentials - Quick Question

  1. October 19th 2008, 01:18 PM #1
    r_maths
    r_maths is offline
    Member
    Joined
    Jan 2007
    Posts
    162

    Exponentials - Quick Question

    Simplify:

    exp(x^3 )^3 = exp(3x^3 )

    Is the answer right? Thanks.
    Follow Math Help Forum on Facebook and Google+
  2. October 19th 2008, 01:21 PM #2
    Tony2710
    Tony2710 is offline
    Junior Member
    Joined
    Jul 2008
    Posts
    46
    No, not quite right.

    If you put some values in for x then you'll see that's it not right.

    The rule you need is:

    (x^n)^m=x^{nm}

    Hope that helps!
    Follow Math Help Forum on Facebook and Google+
  3. October 23rd 2008, 12:04 PM #3
    r_maths
    r_maths is offline
    Member
    Joined
    Jan 2007
    Posts
    162
    Turns out the answer was infact:

    <br /> exp(3x^3 )<br />
    Follow Math Help Forum on Facebook and Google+
  4. October 23rd 2008, 12:07 PM #4
    Moo
    Moo is offline
    A Cute Angle Moo's Avatar
    Joined
    Mar 2008
    From
    P(I'm here)=1/3, P(I'm there)=t+1/3
    Posts
    5,618
    Thanks
    6
    Hello,
    Quote Originally Posted by r_maths View Post
    Turns out the answer was infact:

    <br /> exp(3x^3 )<br />
    that was the answer you would have found if you followed the hint and that you found =)

    \exp(x^3)^3=\left(e^{x^3} \right)^3=e^{3x^3}=\exp(3x^3)
    Follow Math Help Forum on Facebook and Google+
« Rewriting an equation | Integer Proof »

Similar Math Help Forum Discussions

  1. Question on exponentials in inequalities
    Posted in the Differential Geometry Forum
    Replies: 4
    Last Post: December 30th 2011, 08:01 AM
  2. Quick question regarding complex exponentials
    Posted in the Differential Geometry Forum
    Replies: 6
    Last Post: April 30th 2011, 07:09 PM
  3. logs and exponentials question
    Posted in the Algebra Forum
    Replies: 13
    Last Post: October 3rd 2010, 04:24 AM
  4. About exponentials
    Posted in the Pre-Calculus Forum
    Replies: 3
    Last Post: August 16th 2009, 05:46 AM
  5. Quick's quick question
    Posted in the Number Theory Forum
    Replies: 22
    Last Post: July 9th 2006, 04:38 PM

Search Tags


/mathhelpforum @mathhelpforum