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Mathematics 17 Online
OpenStudy (anonymous):

help again.

OpenStudy (anonymous):

log 10 (base a) = 0.25, what is the value of log a (base 10)?

OpenStudy (anonymous):

\[\log_{a}10=0.25 \] \[a ^{0.25}=10\] \[a=10^{4}\] \[\log_{10}a \]=\[\log_{10}10^{4} \] =4

OpenStudy (imstuck):

In your second step, @WilliamZhang if you take the 4th root of a to get rid of the .25, then you have to take the 4th root of 10 also. You put 10 to the 4th, which is not the same thing.\[a ^{.25}=a ^{\frac{ 1 }{ 4 }}=\sqrt[4]{a ^{1}}\]You have to do the same thing to the other side, which is to take the 4th root.

OpenStudy (anonymous):

Are you sure?

OpenStudy (imstuck):

I would have to say so, yeah.

OpenStudy (anonymous):

whats you a then

OpenStudy (imstuck):

1.77827941^4 = 10

OpenStudy (anonymous):

at least my a is right\[\log_{10000}10=0.25 \]

OpenStudy (anonymous):

i don't know how u think, but substitute my a into the function, mine is right

OpenStudy (imstuck):

ok

OpenStudy (anonymous):

\[(a ^{0.25})^{4}=10^{4}=10000\]

OpenStudy (anonymous):

u suck :)

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