What's the opposite reciprocal of 1?
there's no such thing as an opposite reciprocal.
The reciprocal of 1 is 1, because 1/1 = 1
a number and its reciprocal, when multiplied, produce a product of 1, such as
2 and 1/2
3.4 and 4/3
1.7 and 10/17
.4 and 2.5