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Check out this question A binary operation * is defined by a*b = ab+a+b for any real number a and b. if the identity element is zero, find the inverse of 2 under this operation. a∗a−1=aa−1+a+a−1=e if e = 0 2.2−1+2+2−1=0 collecting like terms, we have: 3.2−1+2=0 = 2−1 = -23
2 months ago
A binary operation * is defined by a*b = ab+a+b for any real number a and b. if the identity element is zero, find the inverse of 2 under this operation.
a∗a−1=aa−1+a+a−1=e
if e = 0
2.2−1+2+2−1=0
collecting like terms, we have:
3.2−1+2=0
= 2−1 = -23