Question

1.Tìm \(x\):

\(\dfrac{16.17-5}{16.16-1}\) : ( \(x-\dfrac{2}{3}\)) = \(\dfrac{1}{3}\)

2.Tính:

a; 8\(\dfrac{1}{5}\). (11\(\dfrac{94}{1591}\)- 6\(\dfrac{38}{1517}\)) : 8\(\dfrac{11}{43}\)

b; 10101 . (\(\dfrac{5}{111111}\) + \(\dfrac{5}{222222}\) - \(\dfrac{4}{3.7.11.13.37}\))

giúp mình nhé , ai trả lời được hết cho triệu tích , nếu bạn nào ko biết dấu . là gì thì đó là dấu nhan nhé !!!

Answer 1

1. \(\dfrac{16.17-5}{16.16-1}:\left(x-\dfrac{2}{3}\right)=\dfrac{1}{3}\)

<=> \(\dfrac{272-5}{256-1}:\left(x-\dfrac{2}{3}\right)=\dfrac{1}{3}\)

<=> \(\dfrac{267}{255}:\left(x-\dfrac{2}{3}\right)=\dfrac{1}{3}\)
<=> x - \(\dfrac{2}{3}=\dfrac{267}{85}\)

<=> x = \(\dfrac{971}{255}\)

@Triều Nguyễn Quốc

Answer 2

2. a, 8\(\dfrac{1}{5}\left(11\dfrac{94}{1591}-6\dfrac{38}{1517}\right):8\dfrac{11}{13}\)

= \(\dfrac{41}{5}\left(5\dfrac{60}{1763}\right):\dfrac{355}{43}\)

= \(\dfrac{41}{5}.\dfrac{8875}{1763}:\dfrac{355}{43}\)
= \(\dfrac{1775}{43}:\dfrac{355}{43}\)

= 5

@Triều Nguyễn Quốc