Math Is Fun Forum

BonaviaFx

Member

Registered: 2014-12-15

Posts: 11

Logarithm Problem

If log (base y) x = a and log (base z) x = b where x ≠ 1 , express the following in terms of a and b

a) log (base y) yz

b) log (base x) y/z

If y + z =1 show that 1/a = log (base x) 1-x^1/b

I found this hard, if question is unclear and can take a picture of it.

PatternMan

Member

Registered: 2014-03-08

Posts: 199

Re: Logarithm Problem

Take a picture of the question.

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"School conditions you to reject your own judgement and experiences. The facts are in the textbook. Memorize and follow the rules. What they don't tell you is the people that discovered the facts and wrote the textbooks are people like you and me."

BonaviaFx

Member

Registered: 2014-12-15

Posts: 11

Re: Logarithm Problem

Here is the link to the picture http://prntscr.com/5in3ie

PatternMan

Member

Registered: 2014-03-08

Posts: 199

Re: Logarithm Problem

I'm a noob too so anyone correct me if I'm wrong.

Does this help you?

Last edited by PatternMan (2014-12-19 07:13:35)

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"School conditions you to reject your own judgement and experiences. The facts are in the textbook. Memorize and follow the rules. What they don't tell you is the people that discovered the facts and wrote the textbooks are people like you and me."

Bob

Administrator

Registered: 2010-06-20

Posts: 10,621

Re: Logarithm Problem

hi BonaviaFx

I find it helps to switch log base like this

That should help with the first part and a similar trick will help with the others.

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

BonaviaFx

Member

Registered: 2014-12-15

Posts: 11

Re: Logarithm Problem

Thanks all!