Sequence and series

If a+c=2b and ab+cd+ad= 3bc, then show that a,b,c,d are also in arithmetic progression.


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@admin i send the correct answer , sorry to say but you are telling wrong.

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@abhisheksingh we have to show that a,b,c and d are in arithmetic progression


@rushabhjain see this is the correct solution of my problem

@mohdsabirshaikh i got this answer from another site

@rushabhjain There can be many ways to solve a problem

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@MohdsabirShaikh solution is correct.
Actually speaking its a brilliant solution.
@RushabhJain
Could u tell me what did u find rong here?

@admin This solution is correct OK