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এর মান কত ?

MCQ Practice Mathematics

এর মান কত ?

ক $\begin{Bmatrix} \frac{x(x+1)}{2} \end{Bmatrix}^{2}$
খ $\frac{x(x+1)(2 x+1)}{6}$
গ $\frac{x(x+1)}{2}$
ঘ

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