20

​Q20. Let a , b , c , d be in GP , then show that (a – b)2 , (b – c)2 , (c – d)2 are in GP.

Dear student

Now the sequence a-b2,b-c2,c-d2 can be shown in GP when 

RHS=r2So, LHS=RHSSo terms are in GP
Regards

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