1.

In the expansion of `(3sqrt4+1/(4sqrt6))^20`A. (i),(iii)B. (ii),(iii)C. (i),(ii)D. All three

Answer» Correct Answer - 2
`T _(r+1)=""^(20)Cr.4^((20-r)/(3))6^((-r)/(4),r=0`
`(20-r)/(3),(r)/(4)` both must be intergers.
`therefore r=8,20`
` therefore 2 Rational Terms `
& 19 Irrational Terms
Also middle term is Irrational .


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