1. If m + n = 1, then the value of $$m^3 + n^3 + 3mn$$ is equal to
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By: anil on 05 May 2019 01.49 am
Given : $$m+n=1$$ ------------(i) Cubing both sides => $$(m+n)^3=(1)^3$$ => $$m^3+n^3+3mn(m+n)=1$$ Using equation (i), we get : => $$m^3+n^3+3mn(1)=1$$ => $$m^3 + n^3 + 3mn=1$$ => Ans - (B)
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