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JEE MAIN - Mathematics Bengali (2022 - 24th June Evening Shift - No. 20)
$$1 + 3 + {3^2} + {3^3} + .... + {3^{2021}}$$ -কে 50 দ্বারা ভাগ করলে ভাগশেষ হবে _______ ।
Answer
4
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