Question

If in any binomial expansion a, b, c and d be the 6th, 7th, 8th and 9th terms respectively, prove that:

(b² - ac)/(c² - bd) = 4a/3c .

Answer 1

Let the binomial expansion be (x+y)ⁿ

Given,

Now, substituting the values of a, b, c and d, we get