The number of real values of alpha for w...

The number of real values of `alpha` for which the system of equations `{:(x+3y+5z=alphax),(5x+y+3z=alpha y),(3x+5y+z= alpha z):}` has infinite number of solutions is

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2012-MULTIPLE CHOICE QUESTIONS

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