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

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

Postby Hell0 on Sun Jun 23, 2013 5:08 am

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

Postby FWT on Sun Jun 23, 2013 11:43 am

Hell0 wrote: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.)

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

Postby Hell0 on Sun Jun 23, 2013 4:44 pm

Yeah sorry that's what I meant. And yes X means x
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Re: Log help? express log x in terms in log a, log b, log c.  TOPIC_SOLVED

Postby FWT on Mon Jun 24, 2013 12:32 am

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

Postby Hell0 on Wed Jun 26, 2013 12:36 am

Thanks . I totally misunderstood the question
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