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Numbers related to mathematics
The unit of the power n of 1.2 is nothing more than a cycle of 2, 4, 8 and 6, 4 is a period, and the remainder of 43 1 12609 divided by 4 is 2, so the unit is 2- 1 = 12.

5; 1; 4 or 63.

7, 9, 3, 1 to the nth power 7, 10 divided by the cycle of 4 and 2, so the unit is 9,

3, 9, 7, 1, 15 divided by 4 is greater than 3, so the unit is 7.

Of course, the twentieth power of 2 is 6 and 20 is a multiple of 4.

The n power of 5 is 5. So the unit bit is 9*7*6*5, because 9*7*6 is an even number, and even *5 bits must be 0, so the unit bit.

It's 0