Hi im lost on my last question.
k^-3 = 1/256
this is negative exponets "^-3" that is a negative exponent, I need to know the value of k?
a)-64
b)-4
c)4
d)64
I was thinking 64, eh I don't understand this one. Thanks!
k^-3 = 1/k^3
So, you want
1/k^3 = 1/256
k^3 = 256
Now, 256 = 2^8, so
k = 2^(8/3) = 2^2 * 2^(2/3) = 4∛4
Hmmm. we got trouble.
(a) and (b) are out.
4^-3 = 1/4^3 = 1/64
64^-3 = 1/64^3 = 1/4096
I think that 1/256 is a mistake.
Or, the -3 is a mistake.
16^-2 = 1/16^2 = 1/256
The whole thing is a mess.