Mathematics, 17.12.2021 02:00 jalonnolan

2^n means that 2 is used as a factor n times. For exmple, 2^4 means 222*2=16. We say that 2^4 ends in 6 and that 2^4 has a units digit of 6. If 2^1997 is multiplied out, what is the units (0nes)digit of the product?

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