Question:A = {1, 2}; B = {2, 3} এবং A ও B  এর উপাদানগুলোর অন্বয় y = x + 1

 হলে নিচের কোন অন্বয় সঠিক? 

A {(1, 2), (2, 3)} 
B {(1, 3), (1, 2)} 
C {1, 2} 
D {2, 3} 

+ Answer
A 

+ Explanation
`A xx B `= {(1, 2), (1, 3), (2, 2), (2, 3)}

    :. R = {(1, 2), (2, 3)} [:. y = x + 1]

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