70 = 1 : 71 = 7 ; 72 = 49 : 73 = 343 : 74 = 2401
The final digit repeats as the exponent increases by 4.
So 735 has the same final digit (3) as 73 : 760 has the same final digit (1) as 70.
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They can be written as reciprocals with positive exponents. For example, 5-7 = (1/5)7
It is: 2*7 = 14 and no exponents are needed
It is: 7*17 = 119 and needs no exponents
5 x 7 = 35 No exponents required.
It is: 2*5*7 = 70 and no exponents are needed