If n is positive integer, then (√3+1)2n−(√3−1)2n is
A. an irrational number
B. an odd positive integer
C. none of these
D. a rational number
Answer:A
If n is positive integer, then (√3+1)2n−(√3−1)2n is
A. an irrational number B. an odd positive integer C. none of these D. a rational number