Question

[Khánh Linh]

BT1: Tìm số nguyên x, biết:

1) \(\frac{1}{3}\) + \(\frac{3}{35}\) < \(\frac{x}{210}\) < \(\frac{4}{7}\) + \(\frac{3}{5}\) + \(\frac{1}{3}\)

Answer 1

[Natsu Dragneel]

Ta có :

\(\frac{1}{3}+\frac{3}{35}=\frac{70}{210}+\frac{18}{210}=\frac{88}{210}\)

\(\frac{4}{7}+\frac{3}{5}+\frac{1}{3}=\frac{120}{210}+\frac{126}{210}+\frac{70}{210}=\frac{316}{210}\)

⇒ 88 < x < 316