It is: 1/81
1 over 3 to the negative 2nd power is 9
No. 3 over 8 would be equal to 6 over 16, and 1 over 3 would be equivalent to 2 over 6, and so on and so forth.
i^1=i i^2=-1 i^3=-i i^4=1 and so forth 15 divided by 4 leaves a remainder of 3 i^3=-i
3^-1 = 1 over (3 to the power of 1) = 1/3, one third. a minus power is the same as a normal power but with a 1 above it.
12
No.
25xy/x^5y^4 = 25/X^4y^3 (25 over x to the 4th y to the third)
3 to the power of 1 is 3. 3 to the power of minus 2 is equal to 1 over 3 to the power of 2. 3 to the power of 2 is 9. 3 to the power of 1 times 3 to the power of minus 2 is the same as... 3 divided by 3 to the power of 2. So that gives us 3 divided by 9 which is the same as 1/3.
+81
4
3 3 --- 4
Total Enlightenment my friend.