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I was following along until you got to the 1/a. The only thing I can think of is so that 27^a would make it 27^1 when (a)(1/ a) are multiplied together.
I was following along until you got to the 1/a. The only thing I can think of is so that 27^a would make it 27^1 when (a)(1/ a) are multiplied together.