The sum of values of ' \( p \) ' for which the equations \( x+y+z=1, x+2 y+4 z=p \), and \( x+4 ....

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The sum of values of ' \( p \) ' for which the equations
\( \mathrm{P} \)
\( x+y+z=1, x+2 y+4 z=p \), and \( x+4 y+10 z=p^{2} \) have a solution is


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