Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
Gấp lên 4 lần là tăng thêm 3 phần(4-1=3)
3 phần đó có giá trị bằng:
\(\left(\frac{91}{18}\cdot2\right)-\left(\frac{14}{9}\cdot2\right)=7\)
Phân số thứ 2 la:
3:7=\(\frac{3}{7}\)
Phân số thứ 1 là:
\(\left(\frac{14}{9}\cdot2\right)-\frac{3}{7}=\frac{169}{63}\)
đ/s:.....
Tổng của 2 số thập phân đó là:
\(\frac{14}{9}\)x 2 = \(\frac{28}{9}\)
Tổng của 2 số thập phân sau khi tăng phân số thứ 2 lên 4 lần là:
\(\frac{91}{18}\)x 2 = \(\frac{91}{9}\)
Phân số thứ 2 là: ( \(\frac{91}{9}\)- \(\frac{28}{9}\)) : 3 = \(\frac{7}{3}\)
Phân số thứ 1 là: \(\frac{28}{9}\)- \(\frac{7}{3}\)= \(\frac{7}{9}\)
Đáp số:.......
gọi a, b là 2 phân số cần tìm
theo bài ra ta có: (a+b)/2=14/9 => a+b=28/9
(a+4b)/2=91/18 => a+4b=91/9
Suy ra (a+4b)-(a+b)=91/9-28/9=63/9=7 =>b=7/3
=>a=7/9
Bài bạn Ánh giải đúng những khó nhìn quá, minh xin giải lại
Tổng của 2 số là : \(\frac{14}{9}\)x 2 = \(\frac{28}{9}\)
Sau khi tăng số thứ hai lên 4 lần thì tổng mới là : \(\frac{91}{18}\)x 2 = \(\frac{91}{9}\)
Phân số thứ hai là : (\(\frac{91}{9}\)- \(\frac{28}{9}\)) : (4 - 1) = \(\frac{7}{3}\)
Phân số thứ nhất là : \(\frac{28}{9}\)- \(\frac{7}{3}\)= \(\frac{7}{9}\)
Ta có: \(\frac{a+b+c}{3}=\frac{14}{9}\) và \(\frac{4a+b+c}{3}=\frac{91}{18}\)
\(\frac{4a+b+c-a-b-c}{3}=\frac{91}{18}-\frac{14}{9}=\frac{91-28}{18}\)
Gọi phân số thứ nhất là \(\dfrac{a}{b}\)
Theo đề, ta có:
\(\left(\dfrac{28}{81}-\dfrac{a}{b}\right)\cdot4+\dfrac{a}{b}=\dfrac{91}{9}\)
\(\Leftrightarrow\dfrac{a}{b}\cdot\left(-3\right)=\dfrac{707}{81}\)
hay \(\dfrac{a}{b}=-\dfrac{707}{243}\)
Tổng 2 phân số lúc đầu là:
14/9 x 2 =28/9
Tổng 2 phân số lúc sau là:
91/18 x 2=91/9
Tổng 2 phân số lúc sau hơn tổng 2 phân số lúc đầu là 3 lần phân số thứ nhất
Phân số thứ nhất là:( 91/9 - 28/9 ):2 =7/2
Đ/S:7/2
???????????????????????????????????????????????????????????????
Bằng 7/9
\(\frac{7}{9}\)một trăm phần trăm
\(\frac{7}{9}\)là câu tra lời chính xác
7/9 Đúng
7/9 hay 7/2 vậy các bab
7/9 la đúng đấy
7/9 nha. k mk nhé
cach lam nhu the nao
7/9 la đúng mình làm trên violympic rồi
bay phan chin
7 phần 9 là đúng đấy các bạn
cách làm là như thế nào các bạn . để mình còn học tập đây
7/9 dung minh vua lam o vio roi
/9/frac{7}{9}/)
/(/frac{7}{9}/)
7/9 la dung 100%
úi xin lỗi bạn nha ! tại mình đang
học làm số 7/9 nên ghi như thế
nên các bạn đừng bảo tớ giở nhé!
mình trả lời rùi đấy T I C K mình nhé
xin các cậu đấy!
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7/9 la chinh xac 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%
\(\frac{7}{9}\)Là đúng
làm violympic rôi . vòng 4 bài 3 chứ gì
k nha
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7/9 là đúng 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%
7/9 là đúng
NHỚ KẾT BẠN VỚI TỚI NHÉ
7/9 ban a minh moi lam xong
7/9 la 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7/9 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vai cut may thanh nien toan viet g voi 0
giải hộ cái
7/9 là đúng nhé
7/9
dung 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