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If the continued product of three numbers in G.P. is 216 and the sum of their products in pairs is 156, find the numbers.

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Let the numbers are `a/r,a and ar.`
Then, `a/r*a*ar = 216`
`=>a^3 = 216 => a= 6`
Also,
`a/r(a)+a(ar)+a/r(ar) = 156`
`=> a^2(1/r+r+1) = 156`
`=> (1+r+r^2)/r = 156/a^2`
`=> (1+r+r^2)/r = 156/36`
...
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