Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter
    Offline

    1
    ReputationRep:
    Stuck on question 5Bii? any help would be appreciated and I don't understand the mark scheme..

    Paper: https://b940eb267c31463d4d23ccfd3105...%20Edexcel.pdf

    Mark scheme:
    https://b940eb267c31463d4d23ccfd3105...%20Edexcel.pdf
    Offline

    1
    ReputationRep:
    (Original post by Christina1999H)
    Stuck on question 5Bii? any help would be appreciated and I don't understand the mark scheme..

    Paper: https://b940eb267c31463d4d23ccfd3105...%20Edexcel.pdf

    Mark scheme:
    https://b940eb267c31463d4d23ccfd3105...%20Edexcel.pdf
    Set 5^(x-1) = 2^x

    Take logs
    (x-1)log 5 = x log 2

    Expand brackets on rhs
    xlog5 -log 5 = xlog2

    Sort terms in x onto one side of equation
    xlog5 - xlog 2 = log 5

    Take x outside of brackets
    x (log5-log2) = log 5

    x=log5/(log5-log2)
    • Thread Starter
    Offline

    1
    ReputationRep:
    Ah thank you so much! Don't know how I didn't spot that


    Posted from TSR Mobile
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: May 20, 2016
Poll
Are you going to a festival?
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.