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OpenStudy (anonymous):
Explain how to evaluate log(5)64 and how could I check my answer?
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OpenStudy (e.mccormick):
Do you know the relationship between a log and an exponent?
OpenStudy (anonymous):
No.
OpenStudy (e.mccormick):
\(y=b^x\implies log_b(y)=x\)
OpenStudy (e.mccormick):
For some logs, simpler ones, this relationship can make it not too hard to solve. For others, you might need change of base in a calculator.
OpenStudy (anonymous):
How could I check my answer?
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OpenStudy (e.mccormick):
That would be change of base in a calculator. Get an approximate answer and see if it matches what you got.
OpenStudy (anonymous):
ok
OpenStudy (e.mccormick):
Know the change of base?
OpenStudy (anonymous):
yes
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