A set of formulas in regular order: The third power of a is the fifth power of B, the third power of a is the eighth power of B, A to the fourth power, B to the eleventh power (AB ≠ 0), where the seventh formula is______ . The nth formula is_______ (n is a positive integer) Change "the third power of a to the fifth power of B" to "the second power of a to the fifth power of B" The first floor is obviously wrong.

A set of formulas in regular order: The third power of a is the fifth power of B, the third power of a is the eighth power of B, A to the fourth power, B to the eleventh power (AB ≠ 0), where the seventh formula is______ . The nth formula is_______ (n is a positive integer) Change "the third power of a to the fifth power of B" to "the second power of a to the fifth power of B" The first floor is obviously wrong.

The seventh power of negative a is the twentieth power of B
When n is odd, the power of negative a is the power of 3n-1 of B
When n is even, the power of a is the power of 3n-1 of B