1.

(i) Find the general term in the expansion of (3x^(2) - 1/(3x))^(9). (ii) Find the term independent of x in the above expension.

Answer»


Answer :(i)`(-1)^(R)""^(9)C_(r)3^(9 - 2r)X^(18 - 3r)`, (ii)`:.T_(7) = (-1)^(6)""^(9)C_(6) 3^(9 - 12) = 84/27 = 28/9` is independent of `x`


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