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Problem
Problem
If the roots of the equation
10
x
3
−
c
x
2
−
54
x
−
27
=
0
10x^3 - cx^2 - 54x - 27 = 0
10
x
3
−
c
x
2
−
54
x
−
27
=
0
are in harmonic progression, the value of
c
c
c
is
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