0.75+-0.25 use algorithms to find this answer
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keeping in mind that when the logarithm base is omitted, the base 10 is assumed.
No. We claim that 
and use algebra to prove the statement.
Let
. Multiply this by ten to get 
. Subtract the initial equation to give 
and divide by 
to see that 
. Substituting into the original equation gives , proving the desired statement.
Let