doest it turn out to be +4 or -4? why?
2007-05-24 07:49:07 · 9 answers · asked by jredsje 2 in Education & Reference ➔ Homework Help
none..
2^-2 is 1/2^2=1/4=.25..
itz bcoz ny no. raised to negative exponent is reciprocal of that number raised to positve exponent..
hope dat helped..
jj
2007-05-24 07:54:13 · answer #1 · answered by JJ 4 · 1⤊ 0⤋
2 ^ -2 = 1 / 2^2 = 1/ 2*2 = 1/4
2007-05-24 14:57:50 · answer #2 · answered by Anonymous · 1⤊ 0⤋
a negative exponent means that it can be rewritten as the inverse with a positive exponent
Two examples: 3^-2 = 1/(3^2) & 1/(4^-2) = 4^2
Here's your problem & solution:
2^-2 = 1/(2^2) = 1/4
2007-05-24 15:00:00 · answer #3 · answered by SusanB 5 · 0⤊ 0⤋
Negative exponent means ONE OVER
Therefore 2^-2 actually mean 1 / (2^2) = 1/4
2007-05-24 14:56:42 · answer #4 · answered by tkquestion 7 · 1⤊ 0⤋
It is always 1/4
Because 2^-2 is 2^1/2^3=2/8=1/4 or 2^0/2^2=1/4
get it? when we divide the same number with same or diff exponents, only the exponents are subtracted. and negative sign means 1/(the number with the same exponent in + form)
2007-05-24 14:55:51 · answer #5 · answered by Mock Turtle 6 · 0⤊ 0⤋
its 1/4...
2007-05-24 14:59:16 · answer #6 · answered by Anonymous · 1⤊ 0⤋
it becomes 1/4
2007-05-24 14:56:42 · answer #7 · answered by no nothing 2 · 1⤊ 0⤋
Neither of those is correct.
The laws of indices require:
a^x * a^y = a^(x + y).
Put x = -b and y = b:
a^(-b) * a^b = a^0
Therefore as a^0 = 1,
a^(-b) * a^b = 1
Dividing each side by a^b:
a^(-b) = 1 / (a^b).
You should now be able to evaluate 2^(-2).
2007-05-24 14:57:57 · answer #8 · answered by Anonymous · 0⤊ 0⤋
invert a negative exponent --then divide
2007-05-24 14:58:18 · answer #9 · answered by Theresa 4 · 0⤊ 0⤋