1.

If a,b,c and d in any binomial expansion be the 6th, 7th, 8th and 9th terms respectively, then prove that b2−acc2−bd=4a3c.

Answer»

If a,b,c and d in any binomial expansion be the 6th, 7th, 8th and 9th terms respectively, then prove that b2acc2bd=4a3c.



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