# Logarithms and Index Laws help

1. Jun 13, 2010

### xX-Cyanide-Xx

!!!!Logarithms and Index Laws help!!!!

Ive been trying to complete a revision sheet but it has logarithims and index laws, and i don't know how to do them. Ive included a few of the hardest questions frome the revision sheet in the attachment.

..........Look at attachment.............

I've tried the first question fir the logs:
Log 6 + Log 4
So i separated the two logs and didthem sepratly:
Log 6
x = Log^10 (6)
10^x = 6?

Log 4
x = Log^10 (4)
10 = 4 ???

Then i get stuck there, could someone please show me an example so i can attempt the rest of the questions on the sheet.

And with the index laws i couldn't even start, had no idea wat to do.

#### Attached Files:

• ###### Logs.doc
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Views:
67
Last edited: Jun 13, 2010
2. Jun 13, 2010

### quinnwei

Re: !!!!Logarithms and Index Laws help!!!!

umm.... i dont know if this is what they are asking for...
log4+log6 = log24
is that simplifying?

3. Jun 13, 2010

### xX-Cyanide-Xx

Re: !!!!Logarithms and Index Laws help!!!!

THAT SOUNDS ABOUT RITE, THEN I CAN JUST SIMPLIFY IT further.

4. Jun 13, 2010

### xX-Cyanide-Xx

Re: !!!!Logarithms and Index Laws help!!!!

can someone else check it as well, cus I'm still a little confused.

5. Jun 13, 2010

### xX-Cyanide-Xx

Re: !!!!Logarithms and Index Laws help!!!!

So Log 24
x = Log^10 (24)
then get rid of the log:
10^x = 24^?
But wat power should 24 be so that it equals 10.

is this even correct????

6. Jun 13, 2010

### rl.bhat

Re: !!!!Logarithms and Index Laws help!!!!

No further simplification. That is the answer.

7. Jun 13, 2010

### xX-Cyanide-Xx

Re: !!!!Logarithms and Index Laws help!!!!

Really, so its just Log 24?

8. Jun 13, 2010

### rl.bhat

Re: !!!!Logarithms and Index Laws help!!!!

Yes.

9. Jun 13, 2010

### xX-Cyanide-Xx

Re: !!!!Logarithms and Index Laws help!!!!

Ok thanks so much for the help.