Hi everyone

I am trying to solve this question

Prove that

LOG_{4}X=LOG_{2}√X

Thanks in advance

Printable View

- December 17th 2012, 07:39 AMlostinlalalandProve logarithmic formula is accurate
Hi everyone

I am trying to solve this question

Prove that

LOG_{4}X=LOG_{2}√X

Thanks in advance - December 17th 2012, 07:48 AMMarkFLRe: Prove logarithmic formula is accurate
Hint: prove the identity:

with the change of base formula:

- December 17th 2012, 07:57 AMlostinlalalandRe: Prove logarithmic formula is accurate
Thanks for the quick reply.

What I understood is that I should treat it as change base of log4x to base 2

Though I am sure you are pointing me in the correct direction my brain is dead after looking at this for the past 2 hours - December 17th 2012, 08:00 AMMarkFLRe: Prove logarithmic formula is accurate
Yes, a more specific way to go would be to write:

... - December 17th 2012, 08:08 AMlostinlalalandRe: Prove logarithmic formula is accurate
Thanks, nice car by the way

What confuses me is the square root if I follow through the equation I feel I will still end up with an incorrect fraction - December 17th 2012, 01:48 PMDevenoRe: Prove logarithmic formula is accurate
it is a rule of logarithms that:

log_{n}(a^{b}) = b(log_{n}(a)), even when b = 1/2..... - December 17th 2012, 02:10 PMskeeterRe: Prove logarithmic formula is accurate
- December 19th 2012, 12:43 AMibduttRe: Prove logarithmic formula is accurate
See the image for solution

- December 19th 2012, 01:06 AMBobPRe: Prove logarithmic formula is accurate
Why bother with change of base ? You don't need it, (and I always struggle to remember it anyway, I finish up having to look it up to be sure I'm remembering it correctly).

Let

Let

Comparison of (1) and (2) shows that