1.

Find the 6th term in the expansion of (x^2+a^4/y^2)^10.

Answer»

Solution :6TH term i.e. (5+1)TH term in the expansion of
`(x^2+a^4/y^2)^10` is `"^10C_5(x^2)^10-5(a^4/y^2)^5`
`= 10!/5!5!x^10(a^20/y^10) `
` = 10.9.8.7.6/5.4.3.2.1(x^10a^20)/y^10= 252x^10a^20/y^10`


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