How Do You Solve log_{2}8x^{2} When log_{2}x Equals p?

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Homework Help Overview

The problem involves logarithmic expressions, specifically finding log_{2}8x^{2} in terms of a variable p, where log_{2}x = p. The discussion centers around properties of logarithms and their manipulation.

Discussion Character

  • Exploratory, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the properties of logarithms, particularly how to handle products within logarithmic expressions. There is an attempt to simplify the expression using known logarithmic identities.

Discussion Status

Some participants have provided steps toward simplifying the logarithmic expression, while others have confirmed the understanding of logarithmic properties. There appears to be a progression in the discussion, with some participants expressing confidence in their solutions.

Contextual Notes

There is an assumption that participants are familiar with logarithmic identities and the specific base of the logarithm being used. The original poster seeks guidance on the next steps after an initial attempt.

thomas49th
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Homework Statement


Given that [tex]log_{2}x = p[/tex]
a) Find [tex]log_{2}8x^{2}[/tex] in terms of p


The Attempt at a Solution



take the power outside the log

[tex]2log_{2}8x[/tex]

but i can't see what to do next

Any suggestions

Thanks :)
 
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I assume you mean:
[tex]{log}_{2}(8x^{2})[/tex]

First things first. How do logs work with products? log(ab) = ?? (In your example, a = 8 and b = x^2.)
 
[tex]log_{2}8x^{2}[/tex]

[tex]log_{2}8 + 2log_{2}x[/tex]

[tex]3 + 2p[/tex]

Thanks :)

it was easy!
 
Now you've got it! :wink:
 

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