Question about Texas Instruments TI-84 Plus Calculator
There are very few instances where you have two press two keys AT THE SAME TIME, the most notable of them is when you want to force the calculator into the BOOT SCREEN. Most key combinations are key sequences, meaning you press a key and THEN press another.
This said, let us get back to your question.
When you apply a function on an expression, then apply the inverse of the function on the result you get the original expression back.
If f is a function and f^-1 its inverse, by definition f^-1[f(x)]=f[f^-1(x)] =x
As you can see you do not need a calculator to find the result.
Concerning the logarithmic functions
For the natural logarithms (logarithms in base e) labeled [ln], the inverse of the logarithm is the exponential function e^
ln[e^(x)] =e^[ln(x)] =x
For the common logarithms (logarithms in base 10), labeled [log], the inverse function of the log is the raising 10 to the power of. It is usually called the antilogarithm or antilog.
y= log(x) is equivalent to x=10^(y)
Try the following exemple
log(14) = 1.146128036
To access the 10^x function you press [2nd][LOG]
To access the exponential function you press [2nd][LN]
Posted on Jan 20, 2010
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Posted on Jan 02, 2017
If I understand you correctly, the inverse of the log operation is exponentiation. So if your log = x, the inverse is 10 raised to the x power. On most TI calculators this is on the same key as the log function.
Posted on Jun 13, 2008
Press "2nd LN" which gives you the exponential (inverse natural log) of 7.41 = 1652.426....
Pressing LN will give you back 7.41
Same procedure to use logs to base 10, use LOG and 2nd LOG
Posted on Dec 31, 2008
Sorry to contradict you but there are many types of logarithms, the most important ones are
The inverse function of the natural log function is the exponential (e^(x)), and the inverse of the log in base ten function is the function ten to the power of. It is called (sometimes) the antilog
Question What is the antilog of 3.5678?
Answer The antilog of 3.5678 is 10^(3.5678) = 3696.579068
Verification: log(3696.57908) =3.5678
Hope it helps.
Posted on Nov 29, 2009
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