Question

[Huỳnh Anh]

1.Tính nhanh

A =( \(\dfrac{1}{99}+\dfrac{12}{999}-\dfrac{123}{9999}\)) x \(\left(\dfrac{1}{2}-\dfrac{1}{3}-\dfrac{1}{6}\right)\)

2.Tìm n ∈ Z để \(\dfrac{n+3}{n-2}\)nhận giá trị nguyên 

Answer 1

[ʟɪʟɪ]

1. \(\left(\dfrac{1}{99}+\dfrac{12}{999}-\dfrac{123}{9999}\right).\left(\dfrac{1}{2}-\dfrac{1}{3}-\dfrac{1}{6}\right)\)

\(=\left(\dfrac{1}{99}+\dfrac{12}{999}-\dfrac{123}{9999}\right).0\)

\(=0\)

Answer 2

[✪ ω ✪Mùa⚜ hoa⚜ phượng⚜ là⚜ mùa⚜ th...]