Question 1056923
You are probably having trouble reading 
log expressions
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Say you have an expression that begins
with "log", then read it this way:
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This is a log (which is just an exponent ) . The 
log is on the other side of the equals sign.
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What you have next is:
log( the base of the log and the final result )
The log needs a base.  Say the base is {{{ b }}}
and the log is {{{ k }}}. Now I have:
{{{ b^k }}} and this equals something.
Say it equal {{{ x }}}. Now I can put it all
together as:
{{{ log( b, x ) = k }}}
And, as an exponent:
{{{ b^k = x }}}
Remember the left side of the log 
expression is TELLING you that the 
right side is a log, or expononent.
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{{{ log( 1/2, 16 ) = -4 }}}
{{{ 1/2 }}} is the base
{{{ 16 }}} is the result 
{{{ -4 }}} is the log 
so I have:
{{{ (1/2)^(-4) = 16 }}}
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{{{ log( 5, 1/sqrt(5) ) = -1/2 }}}
{{{ 5^(-1/2) = 1/sqrt(5) }}}
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Just remind yourself when you need to
what the 3 parts of the log expression mean
Hope this helps