Fewpal
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Find n, if the ratio of the fifth term from the beginning to the fifth term from the end in the expansion of (4√2 + 1/4√3)is 6:1.

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Solution:

In the expansion, image,

Fifth term from the beginning image

Fifth term from the end image

Therefore, it is evident that in the expansion ofimage, the fifth term from the beginning is imageand the fifth term from the end isimage.


It is given that the ratio of the fifth term from the beginning to the fifth term from the end is √6:1. Therefore, from (1) and (2), we obtain

Thus, the value of n is 10.

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