Which of the following is the radical expression of a to the four ninths power ?

4a9

9a4

fourth root of a to the ninth power

ninth root of a to the fourth power

Question

Which of the following is the radical expression of a to the four ninths power ?

 4a9

 9a4

 fourth root of a to the ninth power

 ninth root of a to the fourth power

anonymous · Answer

@whpalmer4

whpalmer4 · Answer

x^(a/b) = (x^a)^(1/b)

whpalmer4 · Answer

for example, 4^(3/2) = the square root of 4^3

mertsj · Answer

Just remember:  top number is the power,  bottom number is the root

anonymous · Answer

so b?

anonymous · Answer

it is the second one DI_KAZ

whpalmer4 · Answer

@michaelaepalmore might want to read the discussion again...

mertsj · Answer

So that means that 4 is the power and 9 is the root.

anonymous · Answer

IS it a?

whpalmer4 · Answer

top number is power, bottom number is root.  a to the 4/9 power means the 9th root of a to the 4th power  Is that answer A?

anonymous · Answer

that is d

whpalmer4 · Answer

answer A is likely to be 4a^9, I suspect, which is 4 times a to the 9th power.  a totally different beast!

whpalmer4 · Answer

is the 9 raised up higher than the a wherever the problem is appearing for you?  if so, that's an exponent, and the convention is to represent it with an ^