You are Here: Home >< A-levels

# Core 3 - solving mod function - Help Watch

Announcements
1. Hello

I've solved a mod equation (in image) and the next question is asking me to solve the same equation, involving logs:

(I'm stuck on the question I put a box around)

I'm unsure how to use my previous answer (also in image) to answer this "hence" question

Posted from TSR Mobile
2. (Original post by Yusufff)
Hello

I've solved a mod equation (in image) and the next question is asking me to solve the same equation, involving logs:

(I'm stuck on the question I put a box around)

I'm unsure how to use my previous answer (also in image) to answer this "hence" question

Posted from TSR Mobile
There is one key difference between - a substitution.. (you could swap out the x's for ys in your first answer if it helps.. for the second part, that is).
3. Ok so I'm up to here, would I take the natural log of everything to bring the power of x down?

(Original post by SeanFM)
There is one key difference between - a substitution.. (you could swap out the x's for ys in your first answer if it helps.. for the second part, that is).

Posted from TSR Mobile
4. (Original post by Yusufff)
Ok so I'm up to here, would I take the natural log of everything to bring the power of x down?

Posted from TSR Mobile
Correctamundo so what does that give you?
5. (Original post by SeanFM)
Correctamundo so what does that give you?
I got 1/3 < x < 4/3 - which seems correct? If so thanks for your help
7. (Original post by Yusufff)
I got 1/3 < x < 4/3 - which seems correct? If so thanks for your help
Yes you'll see that fits into 2 < 8^x < 16 so it must be correct

(Original post by mariam687)

I'm sure you'd ace it if you studied Maths
8. (Original post by SeanFM)
Yes you'll see that fits into 2 < 8^x < 16 so it must be correct

I'm sure you'd ace it if you studied Maths

never, im only doing core maths for the sake of it ahaha

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: October 2, 2016
Today on TSR

### Oxbridge

Even more elitist than everyone thought?

### Physically ill after being cheated on

Discussions on TSR

• Latest
• ## 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

## All the essentials

### Student life: what to expect

What it's really like going to uni

### Essay expert

Learn to write like a pro with our ultimate essay guide.

### Create a study plan

Get your head around what you need to do and when with the study planner tool.

### Resources by subject

Everything from mind maps to class notes.

### Study tips from A* students

Students who got top grades in their A-levels share their secrets

## Groups associated with this forum:

View associated groups
Discussions on TSR

• Latest
• ## 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

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