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1. |
The binary operation □ is defined as a □ b = ab+(a+b), where a and b are any two real numbers. The value of the identity element of this operation, defined as the number x such that a □ x = a, for any a, is . |
A. | 0 |
B. | 1 |
C. | 2 |
D. | 10 |
Answer» B. 1 | |