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1. |
If a = ( 5 + 1) / ( 5 - 1) and b = ( 5 - 1) / ( 5 + 1) then the value of (a2 + ab + b2) / (a2 - ab + b2) is ? |
A. | 3/4 |
B. | 4/3 |
C. | 3/5 |
D. | 5/3 |
Answer» C. 3/5 | |