1.

The range of x of which the expansion ( 9 + 25x^2)^(-6//5) is valid is

Answer»

`(-3//5 , 3//5)`
`[-3//5, 3//5]`
`(-OO, 3//5)`
`(-oo, - 3//5)CUP(3//5, oo)`

ANSWER :A


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