1.

Let f_(1) be the frequency

Answer»

`f_(1) -f_(2) = f_(3)`
`f_(2) -f_(1) =f_(3)`
`f_(3) =(1)/(2) (f_(1) +f_(2))`
`f_(1) +f_(2) =f_(3)`.

Solution :`f_(1)` relates `rArr n_(1) = 1, n_(2) =ALPHA`
`f_(2)` relates `rArr n_(1) =1, n_(2) =2`
`f_(3)` relates `rArr n_(1) =2, n_(2) = alpha` .


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