Question

[Nguyễn Quốc Gia Khoa]

a)0,75 + 15/6 : 5 - 1/36 . (-3)² + (-2020/2021)

b)4⁵. 9⁴ - 2 . 6⁹/2^{10 .} 3⁸ + 6⁸ . 20

Answer 1

[Nguyễn Lê Phước Thịnh]

b: \(\dfrac{4^5\cdot9^4-2\cdot6^9}{2^{10}\cdot3^8+6^8\cdot20}\)

\(=\dfrac{2^{10}\cdot3^8-2^{10}\cdot3^9}{2^{10}\cdot3^8+3^8\cdot2^{10}\cdot5}\)

\(=\dfrac{2^{10}\cdot3^8\left(1-3\right)}{2^{11}\cdot3^9}\)

\(=\dfrac{1}{2}\cdot\dfrac{-2}{3}=\dfrac{-1}{3}\)

Answer 2

[Nguyễn Quốc Gia Khoa]

Sửa đề câu a) phải là (-2020/2021)⁰

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