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A = {x: r ∈ N, x² + 9x + 20 = 0} হলে n(A) = কত?

Created: 8 months ago | Updated: 8 months ago

Updated: 8 months ago

4

2

1

0

নবম-দশম শ্রেণি (মাধ্যমিক) ঢাকা বোর্ড উচ্চতর গণিত

Explanation

419

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