Practicing Success
CUET Preparation Today
CUET
General Test
Quantitative Reasoning
Algebra
-1
1
3
0
Given = a + b + c = 2.234 + 3.121 – 5.355 = 0 If a + b + c = 0, then a3 + b3 + c3 – 3abc = 0, which can be proved as a + b = – c Cubing both sides, we get ⇒ (a + b)3 = (– c)3 ⇒ a3 + b3 + 3ab(a + b) = – c3 ⇒ a3 + b3 + 3ab(– c) = – c3 ⇒ a3 + b3 – 3abc = – c3 ⇒ a3 + b3 + c3 – 3abc = 0