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Let a1,a2,a3,… be a G.P. such that a1<0, a1+a2=4 and a3+a4=16. If 9∑i=1ai=4λ, then λ is equal to :

Answer»

Let a1,a2,a3, be a G.P. such that a1<0, a1+a2=4 and a3+a4=16. If 9i=1ai=4λ, then λ is equal to :



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