i need to know how to get this on a calculator

81 = 3 power of 4

25 = 5 power of 2

if anyone knows how to do it with there calc i can prolly apply it to mine thanks

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- Nov 2nd 2009, 05:50 PMrealisticcalculator help
i need to know how to get this on a calculator

81 = 3 power of 4

25 = 5 power of 2

if anyone knows how to do it with there calc i can prolly apply it to mine thanks - Nov 2nd 2009, 05:59 PMVonNemo19
- Nov 2nd 2009, 06:02 PMrealistic
- Nov 2nd 2009, 06:06 PMVonNemo19
- Nov 2nd 2009, 06:09 PMrealistic
- Nov 2nd 2009, 06:13 PMVonNemo19
- Nov 2nd 2009, 06:53 PMrealistic
- Nov 2nd 2009, 07:37 PMWilmer
You then need 5^x = 625.

So x = log(625) / log(5) ; got an "ln" key on your calculator?

If 4 is the given, then x^4 = 625.

So x = 625^(1/4).

Tattoo this on your wrist (under your watch!):

If a^b = c, then a = c^(1/b)

If a^b = c, then b = log(c) / log(a)