Question about Texas Instruments TI-30 XIIS Calculator

# Guys i need to get an inverse log the same as log-1 ou know how?

Please help me i have a test and i cant do it on this stupid texas instrument calculator ti-30xiib

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• Texas Instru... Master

Hello

When you talk about the natural logarithms [LN], the inverse of the log is the exponential

ln (exp(x))=exp(ln(x)) =x
but with othe logarithms, thinhs are different
Let us take

y=10^(x)

then with log standing as usual for log in base 10 take the log of both members in the above equality

log(y) =log{10^(x)) = x* log(10) : this is a property of the log function.
However, log(10) =1 This is also a property of the log

Gathering results, we end up with the new equality
log(y)=x or x=log(y)

Without entering into extraneous details that mathematicians adore, we can state that there is an equivalenve between y=10^(x) and x=log(y)

y=10^(x) <-->x=log(y) where <--> means implication in both directions.

Here is a screen capture from another calculator to convinve you. Your calculator cannot do that.

Hope it helps.

Posted on Oct 09, 2009

• k24674 Oct 09, 2009

By the way, you cannot praise the calculator for its intelligence anymore than you can blame it for its stupidity. It has neither.

• k24674 Oct 09, 2009

OOPS Correction
Gathering results, we end up with the new equality
log(y)=x or x=10^(y)

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Posted on Jan 02, 2017

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