1. If a + b = 4 and ab = 3, then what is the value of $$a^{3} + b^{3}$$ ?
Write Comment
Comments
By: anil on 05 May 2019 01.46 am
Given : $$ab=3$$ -----------(i) Also, $$a+b=4$$ -----------(ii) Cubing both sides, we get : => $$(a+b)^3=(4)^3$$ => $$a^3+b^3+3ab(a+b)=64$$ Substituting values from equation (i) and (ii) => $$a^3+b^3+3(3)(4)=64$$ => $$a^3+b^3=64-36=28$$ => Ans - (C)
Terms And Service:We do not guarantee the accuracy of available data ..We Provide Information On Public Data.. Please consult an expert before using this data for commercial or personal use