TS Police SI Mains 2018 Paper 3

Question : 49 of 200

Marks: +1, -0

\;{x}/{a} = \;{y}/{b} = \;{z}/{c}

and l, m, n are any positive numbers then these ratios are also equal to:

$(\;{l^{2}x^{2}\;+\;m^{2}y^{2}\;+\;n^{2}z^{2}}/{la^{2} + mb^{2} + nc^{2}}) ^{\;{1}/{2}}$
$(\;{lx^{2}\;+\;my^{2}\;+\;nz^{2}}/{l^{2}a^{2} + m^{2}b^{2} + n^{2}c^{2}}) ^{\;{1}/{2}}$
$(\;{lx^{2}\;+\;my^{2}\;+\;nz^{2}}/{la^{2} + mb^{2} + nc^{2}}) ^{\;{1}/{2}}$
$(\;{lx^{2}\;+\;my^{2}\;+\;nz^{2}}/{la^{2} + mb^{2} + nc^{2}})$

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