Results 1 to 8 of 8

Thread: very hard question

  1. #1
    Super Member
    Joined
    Oct 2008
    From
    Bristol, England
    Posts
    897

    very hard question

    hi this is m question:

    2X 81^\frac{1}{4}
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Sep 2008
    From
    West Malaysia
    Posts
    1,261
    Thanks
    1
    Quote Originally Posted by andyboy179 View Post
    hi this is m question:

    2x 81^\frac{1}{4}
    hint : 3^4=81
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member
    Joined
    Oct 2008
    From
    Bristol, England
    Posts
    897
    dunno, how would i do it?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    Joined
    Sep 2008
    From
    West Malaysia
    Posts
    1,261
    Thanks
    1
    Quote Originally Posted by andyboy179 View Post
    dunno, how would i do it?
     <br />
2\times (3^4)^{\frac{1}{4}}<br />
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Super Member
    Joined
    Oct 2008
    From
    Bristol, England
    Posts
    897
    i don't understand!!!!!!!!!!!

    this is a question which i have done:
    3X 125^\frac{1}{3} = cube root 125= 5x3=15

    i need to set it out like this for the question i posted, do you know how to work it out like this?
    Follow Math Help Forum on Facebook and Google+

  6. #6
    MHF Contributor
    Joined
    Sep 2008
    From
    West Malaysia
    Posts
    1,261
    Thanks
    1
    Quote Originally Posted by andyboy179 View Post
    i don't understand!!!!!!!!!!!

    this is a question which i have done:
    3X 125^\frac{1}{3} = cube root 125= 5x3=15

    i need to set it out like this for the question i posted, do you know how to work it out like this?
    5\times 5\times 5=5^3=125 , therefore , \sqrt[3]{125}=5

    so in your case now ,

    3\times 3\times 3\times 3=3^4=81 , therefore , \sqrt[4]{81}=3

    Then proceed , 2\times 3 =6
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Super Member
    Joined
    Oct 2008
    From
    Bristol, England
    Posts
    897
    Quote Originally Posted by mathaddict View Post
    5\times 5\times 5=5^3=125 , therefore , \sqrt[3]{125}=5

    so in your case now ,

    3\times 3\times 3\times 3=3^4=81 , therefore , \sqrt[4]{81}=3

    Then proceed , 2\times 3 =6

    thankyou very much for all the question you have helped me on
    Follow Math Help Forum on Facebook and Google+

  8. #8
    MHF Contributor
    Joined
    Sep 2008
    From
    West Malaysia
    Posts
    1,261
    Thanks
    1
    Quote Originally Posted by andyboy179 View Post
    thankyou very much for all the question you have helped me on
    you are welcome .
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. cos question hard
    Posted in the Trigonometry Forum
    Replies: 3
    Last Post: September 20th 2011, 01:37 PM
  2. Hard question.
    Posted in the Discrete Math Forum
    Replies: 3
    Last Post: December 8th 2009, 12:48 PM
  3. Please Help, Hard Question for me.
    Posted in the Math Topics Forum
    Replies: 3
    Last Post: January 28th 2009, 01:24 PM
  4. Need some help with a hard question
    Posted in the Calculus Forum
    Replies: 1
    Last Post: January 23rd 2007, 05:05 AM
  5. need help hard question
    Posted in the Algebra Forum
    Replies: 5
    Last Post: May 29th 2006, 05:18 AM

Search Tags


/mathhelpforum @mathhelpforum