Question:S = {(x, y) : x`in`A, এবং y`in`A y - x = 1}, A 

 = {-3, -2, -1, 0} হলে রেঞ্জ S কত? 

A {-2, -1, 0,1} 
B {-2, -1,0} 
C {-3, -2, 10} 
D {-2, -1, 0, 2} 

+ Answer
B 

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Irin Moni

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