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  1. If m + n = 1, then the value of m3 + n3 + 3mn is equal to
    1. 0
    2. 1
    3. 2
    4. 3
Correct Option: B

m3 + n3 + 3mn
= m3 + n3 + 3mn(m + n) [∵  m + n =1]
= (m + n)3 = 1


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