## Log help? express log x in terms in log a, log b, log c.

Complex numbers, rational functions, logarithms, sequences and series, matrix operations, etc.
Hell0
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Joined: Sun Jun 23, 2013 5:04 am
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### Log help? express log x in terms in log a, log b, log c.

Alright so here's the question:
Express log x in terms in log a, log b, and log c.
X=(ab)^3/c
(ab cubed All over c)

Not sure how to approach this. Do I make it log(ab)^3 or log(a)*log(b)^3 ?

FWT
Posts: 153
Joined: Sat Feb 28, 2009 8:53 pm

### Re: Log help? express log x in terms in log a, log b, log c.

Express log x in terms in log a, log b, and log c.
X=(ab)^3/c
(ab cubed All over c)
"X" means "x", right? (That's not the way its "supposed" to be so I'm asking.)
Do I make it log(ab)^3 or log(a)*log(b)^3 ?
The cube is on the product, not only the b, so the powers work like this: (ab)^3 = (a^3)(b^3)

Hell0
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### Re: Log help? express log x in terms in log a, log b, log c.

Yeah sorry that's what I meant. And yes X means x

FWT
Posts: 153
Joined: Sat Feb 28, 2009 8:53 pm

### Re: Log help? express log x in terms in log a, log b, log c.

Yeah sorry that's what I meant. And yes X means x
Okay, so you have log(x) = log((ab)^3 / c). Turn the dividing into subtracting. Then turn the (ab)^3 into a^3 b^3 and turn the multiplying into adding. Then turn the powers intyo coefficients. (Use the rules here.) Plz write back if you're stuck.

Hell0
Posts: 24
Joined: Sun Jun 23, 2013 5:04 am
Contact:

### Re: Log help? express log x in terms in log a, log b, log c.

Thanks . I totally misunderstood the question

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