Question

If the 3rd, 4th, 5th and 6th terms in the expansion of (x+y)ⁿ be respectively a, b,c and d, prove that :

$b {}^{2} - ac \: \div \: c ^{2} - bd \: \: \: \: \: = \: \: \: 5a \: \div \: 3c$
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Answer 1

Hey!

I'm putting y as alpha here because I have already given same question.

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Equating,

=) b²-ac/c² - bd = 5a/3c.

Answer 2

Step-by-step explanation:

Refer to the attachment...