3 Phase power is supplied by a 3 pole supply like a breaker. So essentially yes.
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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.
It's the same
3 to the power of 2 is the same as saying 3x3, which equals 9. (The answer is 9.)
It is the same as 3 to the power of 8 which is 6561
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.