Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    2
    ReputationRep:
    Find the value of n

    1) 1/8 = 8^n

    2) (√7)^5 = 7^n

    3) 125^-2/3 x (1/5)^2

    Need help on these questions
    Offline

    15
    ReputationRep:
     \displaystyle x^{-m} = \frac{1}{x^m} .

     \displaystyle x^{\frac{a}{b}} = \sqrt[b]{x^a} .
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by B_9710)
     \displaystyle x^{-m} = \frac{1}{x^m} .

     \displaystyle x^{\frac{a}{b}} = \sqrt[b]{x^a} .
    I know those already but thanks anyways..
    Offline

    22
    ReputationRep:
    (Original post by kb12345)
    Find the value of n

    1) 1/8 = 8^n

    2) (√7)^5 = 7^n

    3) 125^-2/3 x (1/5)^2

    Need help on these questions
    So apply it if you know it...

    \frac{1}{8} = 8^{-1}, so n = \cdots ?
    Offline

    15
    ReputationRep:
    (Original post by kb12345)
    I know those already but thanks anyways..
    That's all you need for these questions though ..
    Offline

    2
    ReputationRep:
    (Original post by Zacken)
    So apply it if you know it...

    \frac{1}{8} = 8^{-1}, so n = \cdots ?
    Why did you delete my post in which I gave the solution to the problem?
    Offline

    22
    ReputationRep:
    (Original post by HapaxOromenon2)
    Why did you delete my post in which I gave the solution to the problem?
    Precisely because it was a full solution to the problem.
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Would you rather give up salt or pepper?
    Useful resources

    Make your revision easier

    Maths

    Maths Forum posting guidelines

    Not sure where to post? Read the updated guidelines here

    Equations

    How to use LaTex

    Writing equations the easy way

    Student revising

    Study habits of A* students

    Top tips from students who have already aced their exams

    Study Planner

    Create your own Study Planner

    Never miss a deadline again

    Polling station sign

    Thinking about a maths degree?

    Chat with other maths applicants

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Write a reply...
    Reply
    Hide
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.