1.

The LCM of the polynomials \(x^3 + 3x^2 +3x +1\), \(x^2 + 2x + 1\) and \(x^2 - 1\) is:(a) (x2 - 1)(x + 1)3(b) (x2 + 1)(x - 1)2(c) (x2 - 1)(x - 1)2(d) (x + 1)3

Answer»

(a) (x2 - 1)(x + 1)3

\(x^3 + 3x^2 +3x +1\) = (x + 1)3

\(x^2 + 2x + 1\) = (x + 1)2

\(x^2 - 1\) = (x + 1)(x - 1)

∴ Reqd. LCM = (x - 1)(x + 1)3

= (x2 - 1)(x + 1)3



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