1.

If the coefficient of x^(7) in [ax^(2) + (1/(bx))]^(11) equals the coefficient of x^(-7) in [ax - (1/(bx^(2)))]^(11), then a and b satisfy the relation

Answer»

`a + B = 1`
`a - b = 1`
`AB = 1`
`a/b = 1`

ANSWER :C


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