If m is the AM of two distinct real numb...

If m is the AM of two distinct real numbers l and n `(l,ngt1)` and `G_(1),G_(2)" and "G_(3)` are three geometric means between l and n, then `G_(1)^(4),2G_(2)^(4),G_(3)^(4)` equals

`4lmn^(2)`

`4l^(2)m^(2)n^(2)`

`4l^(2) mn`

`4 lm^(2)n`

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