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$a x^{2} + b x + c = 0$ এর মূলদ্বয় a,b হলে $\frac{1}{a}, \frac{1}{b}$ মূল বিশিষ্ট সমীকরণ কোনটি?

a x^{2} + c x + a

c x^{2} + a x + b = 0

c x^{2} + b x + a = 0

c x^{2} - b x + a = 0

ANS : 3

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