In the binomial expansion of a - b n - n - 5- the sum of the 5th and 6th terms is zero- Then a - b equals A- n-5-6B- n-4-5D- 5-n-5

The correct option is B ^nC_4 a^1 4( b)^4+^nC_5 a^n 5( b)^5=0 ⇒ ^nC_4 a ^nC_5 b=0 ⇒ a/b=nc_5/nc_4=n 4/5 ...

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Binomial Expression

In the binomi...

Question

In the binomial expansion of $(a - b)^{n}, n \geq 5,$ the sum of the $5^{t h} a n d 6^{t h}$ terms is zero. Then a/b equals

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