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(#M40041613) MATHS Numerical Ability question log Keep an EYE

What is the value of log3 (-9)?

Asked In Maths swati sharma (10 years ago)

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Srigiti  (10 years ago)

log3 (-9)
Split -9 into 9*(-1).
=> log3(9)(-1)
=>log3(3^2)(-1)
Logarithmic rule says the power inside the bracket will come in front of log.
=> 2log3(3)(-1)
Another logarithmic rule says that when the base and the number are same then the log term cancels out.
=> 2(-1)
=> -2.

Thus , the ans is -2.

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Yuvaraju D  (10 years ago)

log3(-9)= log3+log(-9)
=log3+log(3^2*-1)
=log3+log(3^2)+log(-1)
=3log3+log(i^2)
=3log3+2logi

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AKSHAY UPADHYAY  (9 years ago)

it is not defined

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