# calculator help

• Nov 2nd 2009, 05:50 PM
realistic
calculator 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 PM
VonNemo19
Quote:

Originally Posted by realistic
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

The ^ button means "raised to the" .
• Nov 2nd 2009, 06:02 PM
realistic
Quote:

Originally Posted by VonNemo19
The ^ button means "raised to the" .

hi i can get 3 ^ 4 = 81

however i need the reverse how to get 3 ^4
• Nov 2nd 2009, 06:06 PM
VonNemo19
Quote:

Originally Posted by realistic
hi i can get 3 ^ 4 = 81

however i need the reverse how to get 3 ^4

AAAAAAAAAAhhhh. I see. Well, I'm with you, then. I'd like to know if a calculator could do that, too. However, I must say that factoring is probably quiker than picking up the calculator...
• Nov 2nd 2009, 06:09 PM
realistic
Quote:

Originally Posted by VonNemo19
AAAAAAAAAAhhhh. I see. Well, I'm with you, then. I'd like to know if a calculator could do that, too. However, I must say that factoring is probably quiker than picking up the calculator...

for example if i have 625 is there a fast way to find out its 5^4 (Bow)

just takes me too long sometimes to do it :(
• Nov 2nd 2009, 06:13 PM
VonNemo19
Quote:

Originally Posted by realistic
for example if i have 625 is there a fast way to find out its 5^4 (Bow)

just takes me too long sometimes to do it :http://mathhelpforum.com/algebra/112082-calculator-help.html#post396506\" rel=\"nofollow\">
for example if i have 625 is there a fast way to find out its 5^4

If you're not given the 5 or the 4, then there's no "fast way".
• Nov 2nd 2009, 06:53 PM
realistic
Quote:

Originally Posted by Wilmer
If you're not given the 5 or the 4, then there's no "fast way".

ok, say you are given the 5 how do you enter it in the calculator to get the ^ 4
• Nov 2nd 2009, 07:37 PM
Wilmer
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).