যদি 3x^2-kx+k=0 এর কোনো সমাধান না থাকে তবে k এর মান কত?
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★ Solution :
◍ There won't be any real solution for x if b² < 4ac
So, k² have to less than 4×3×k = 12k
♧ k have to (0,12) for the solution being imaginary.
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