JEE Main | 2014Math miscellaneousHard

Question

If α, β ≠ 0, and f(n) = αn + βn and
         
= K(1 - α)2 (1 - β)2 (α - β)2, then K is equal to

Options

A.1
B.-1
C.αβ
D.

Solution



= [(1 - α)(1 - β)(1 - β)]2
So,

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