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September 4, 2015

Homework Help: Logarithms

Posted by leo on Saturday, March 22, 2008 at 5:14pm.

Hi,

Can anyone tell me if the following are correct please:-

If x = 10y (where x > 0), then log10 x = y

if a and b are positive numbers, then,

2 log 10 a / b = 2log 10 a - 2 log 10 b

and lastly

if a and b are positive numbers, then,

log 10 ( a+b ) = 10 log 10 a + log 10 b

Thanks.......

:-)

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