# I am trying to find out where is

I am trying to resolve math.question but I am stuck because do not know where on calculator is" antilog"

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• Sharp Master

Hello,

1. Let y=10^(x) ( 10 raised to the power of x)
2. Take the log of both tems of the equality.
3. You getlog(y)=log[10^(x)] where I used square brackets for clarity.
4. But from the general properties of logarithmslog(b^(a)) = a*log(b)
5. Applied to our expression above ( in Number 1)log(10^x)=x*log10
6. But since we are using log as log in base 10, log_10(10)=1 so log(y)=x
7. We thus have two equivalent relations y=10^x <----> x=log(y) The double arrow stands for equivalence.

If y is the log of x, then x is the antilog of y

Let's get back to you problem : To obtain the antilog you use the key marked with a 10^x.

Exemple1: What is the antilog of 3
Answer: Antilog(3) =10^3 =1000 because log(1000) =3.

Exemple 2: What is the antilog of 1.543765?
Antilog(1.543765) = 10^ (1.543765)= 34.97558603

Exemple3: What is the antilog of -0.37654?

Look on the body of the calculator if there is key or a [Shift] key labeled with 10^x ( a 10 with a small raised x). If you are able to find it, use it. If not, you can always use the [raise to the power key] ( a caret ^, or Y to the x or X to the y.) For the last exemple, you type it as follows.
10 [^] (-) 0.37654 [=/ENTER]. The (-) is the change sign not the regular Minus.

Hope it helps.
Thanks for using FixYa.

Posted on Nov 19, 2009

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Posted on Jan 02, 2017

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