If the coefficient of x^5 in the expansion of (ax^2+1/{bx})^{13} is equal to the coefficient of x^{-5} in the expansion of (ax-1/{bx^2})^{13} , then ab =

TS EAMCET 4 May 2018 Shift 1 Solved Paper

Section: Mathematics

Question : 17 of 160

Marks: +1, -0

If the coefficient of x5 in the expansion of (ax2+

)13 is equal to the coefficient of x−5 in the expansion of (ax−

bx2

)13 , then ab =

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