You are Here: Home >< Maths

# hegartymaths explanation :( watch

1. Hi,

Currently studying Maths A Level, and I did a C3 solomon paper (C). I was marking it and when I didn't understand the mark scheme I used the hegartymaths videos.

There is one part in the video that I don't understand. At 7:50 - 8:02 he has (8(rootx))^-1 and he turned it into a positive power.

I've never seen this before, so pls can someone explain how he did that step?

Thank you!
2. (Original post by djels013.211)
Hi,

Currently studying Maths A Level, and I did a C3 solomon paper (C). I was marking it and when I didn't understand the mark scheme I used the hegartymaths videos.

There is one part in the video that I don't understand. At 7:50 - 8:02 he has (8(rootx))^-1 and he turned it into a positive power.

I've never seen this before, so pls can someone explain how he did that step?

Thank you!
They just use ln(x^k) = k lnx.

This is a general rule of logarithms.

### Related university courses

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: March 6, 2018
The home of Results and Clearing

### 1,219

people online now

### 1,567,000

students helped last year
Today on TSR

### University open days

1. Sheffield Hallam University
Tue, 21 Aug '18
2. Bournemouth University
Wed, 22 Aug '18
3. University of Buckingham
Thu, 23 Aug '18
Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams