IN MATH: 1. n. an operation which undoes another operation. EX. Addition of 5 undoes subtraction of 5.

OPERATION ITS INVERSEaddition subtraction subtraction addition multiplication division squaring square-rooting raising to the second power raising to the 1/2 power taking the opposite taking the opposite taking the reciprocal taking the reciprocal

2. n. for addition, the opposite; for multiplication, the reciprocal: for an operation with an identity, one number of a pair of numbers whose operation together results in the identity. FOR EXAMPLE:

number, operation, inverse, identity 5 + -5 = 0 -5 + 5 = 0 5 times 1/5 is 1 1/5 times 5 is 1

ENGLISH: 1. as defined in #1 above.

APPLICATION: (see list 280)

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