Turn on thread page Beta
    • Thread Starter
    Offline

    3
    ReputationRep:
    how would you do this?
    log3y (3 at the bottom) + log93y (9 at the bottom) = 2
    Offline

    16
    ReputationRep:
    Add them togethor using log rules so log3(3y^2)=2, and solve from there.
    Offline

    20
    ReputationRep:
    you can type in the subscripts like this:

    log{sub}3{/sub}y

    but using square brackets [ ] instead of curly ones { }

    log3y
    Offline

    16
    ReputationRep:
    (Original post by the bear)
    you can type in the subscripts like this:

    log{sub}3{/sub}y

    but using square brackets [ ] instead of curly ones { }

    log3y
    Damn, you got anymore life hacks like that?
    • Community Assistant
    Offline

    20
    ReputationRep:
    Community Assistant
    (Original post by Radioactivedecay)
    Add them togethor using log rules so log3(3y^2)=2, and solve from there.
    Not applicable. Different bases.
    Offline

    20
    ReputationRep:
    (Original post by Radioactivedecay)
    Damn, you got anymore life hacks like that?
    my life is one big hack :smug:
    Offline

    16
    ReputationRep:
    (Original post by RDKGames)
    Not applicable. Different bases.
    Oh crap, I saw the first one and assumed it was gonna be the same my bad.
    Offline

    16
    ReputationRep:
    Disregard my first post. For this you can change the base of one of the logs to make the same as the other one. Use this formula:
    logax=logbx/logba
    • Thread Starter
    Offline

    3
    ReputationRep:
    thank you
    Offline

    12
    ReputationRep:
    What’s the answer
    Posted on the TSR App. Download from Apple or Google Play
    • Community Assistant
    Offline

    17
    ReputationRep:
    Community Assistant
    Use the change of base identity (or you can play around with algebra).
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: March 4, 2018
Poll
Cats or dogs?
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

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.