Casio Calculator Q

sillysocks

Hi all,

Just a very quick question about solving an equation with an exponent with a calculator.

If I have say 2^x = 32

What is the calculator sequence that will give me what X is?

The example above is simple enough but I'd like to be able to do these on more complicated questions.

Thanks!

leedsfan88

2x2x2x2x2 or else 2^5

Thomas_S_Hunterson

[latex]\displaystyle \frac{log(32)}{log(2)}[/latex] will give you x.

In general for [latex]a^x = b[/latex], you can use [latex]\displaystyle x = \frac{log(b)}{log(a)}[/latex]

sillysocks

leedsfan88 wrote: »

2x2x2x2x2 or else 2^5

Yes but I'm looking to find how to get the calculator to give me the figure for X.


Say if the question was 4^X = 262144, Find X.

Is there a button on the calculator that calculates this for me, so that it gives me the answer which is 9 in this case?

sillysocks

Sean_K wrote: »

[latex]\displaystyle \frac{log(32)}{log(2)}[/latex] will give you x.

In general for [latex]a^x = b[/latex], you can use [latex]\displaystyle x = \frac{log(b)}{log(a)}[/latex]

Thanks a lot! That'll do the trick.