1.

Find the middle term in the following expansion: (i) (x^(2)-(1)/(x^2))^(10)(ii) ((x)/(a)+(a)/(x))^(12)(iii) ((a)/(x)+bx)^(2n)""(iv) (x-(1)/(x))^(9)(v) (1-3x+3x^(2)-x^(3))^(6)(vi) (x^(2)-a)^(11) ""(vii) (2x-(3)/(x^2))^(15)

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SOLUTION :N/a


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