Can anyone help with these proofs?

Prove the following formulas for changing from one base to another:

a) log_b x = (log_b a)(log_a x)

b) log_b x = (log_a x)/(log_a b)

Thank so much

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- May 7th 2007, 10:01 AMPercent09Logarithm proofs
Can anyone help with these proofs?

Prove the following formulas for changing from one base to another:

a) log_b x = (log_b a)(log_a x)

b) log_b x = (log_a x)/(log_a b)

Thank so much - May 7th 2007, 10:35 AMjanvdl
- May 7th 2007, 10:40 AMjanvdl
I cant seem to find (a) in my maths book... :confused:

Could you just double check your post?