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What is the answer for question 15) ? http://postimg.org/image/6g52noj6f/

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lkballer24 | Student, Grade 11 | (Level 1) Valedictorian

Posted May 28, 2013 at 11:33 PM via web

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What is the answer for question 15) ?

http://postimg.org/image/6g52noj6f/

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violy | High School Teacher | (Level 3) Assistant Educator

Posted May 29, 2013 at 12:14 AM (Answer #1)

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The Product Rule for Logarithms

For any positive numbers M, N and `a (a=1)`  ,

`log_aMN = log_aM + log_aN`

It is not possible to use the product rule for logarithms on log(-7) + log(-4), since -7 anf -4 are not positive numbers.

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