Exams › JEE Advanced › Maths › Algebra (Binomial and Algebraic Identities)
1 questions with worked solutions.
Q1. If x + 1/x = 3, find the value of x³ + 1/x³.
Answer: 18
Using the identity (x + 1/x)³ = x³ + 1/x³ + 3(x + 1/x): 27 = x³ + 1/x³ + 9, so x³ + 1/x³ = 18.