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In the expansion of (x+P)^n,the 6th ,7th...

In the expansion of `(x+P)^n`,the 6th ,7th,8th and 9th terms are a,b,c and d resp,show that `(b^2-ac)/(c^2-bd)=(4a)/(3c)`

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UNITED BOOK HOUSE-MODEL QUESTION PAPERS-SET 10-EXERCISE
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