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दो रेखाएँ L(1):x=5, (y)/(3-alpha)=(z)/(-...

दो रेखाएँ `L_(1):x=5, (y)/(3-alpha)=(z)/(-2)` तथा `L_(2):x=alpha, (y)/(-1)=(z)/(2-alpha)` समतलीय हैं, तब `alpha` का मान हो सकता है

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