One Coefficient, Smartly
Difficulty: Hard · Topics: Algebra, Polynomials, Polynomial Identities
Bitta koeffitsient, aqlli usulda
Find the coefficient of x^3 in the expansion of (1+x)^5(1-x)^4.
(1+x)^5(1-x)^4 yoyilmasida x^3 ning koeffitsientini toping.