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HR
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VP
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H24
10 tháng 11 2017 lúc 23:44

Gọi x là số cá câu được, n là số cá còn lại trên bờ sông, ta tính được kết quả: x=1/8(27n + 38) với n=8/3m – 2 và m thuộc B(3)

Vì họ câu tồi nên x phải nhỏ nhất, nghĩa là n nhỏ nhất, cũng tức là m nhỏ nhất: m=0. Từ đó có đáp số: n = -2 và x = -2

Số cá còn lại trên bờ, sau khi cả 3 anh chàng đã lấy phần mình mang về nhà, đúng bằng số cá cả 3 câu được: x = n = -2

GIẢI THÍCH:Người thứ nhất ngủ dậy, đếm thấy (-2) con cá, không chia hết cho 3, bèn vứt xuống sông thêm 1 con để số cá trở thành (-3); anh ta lấy 1/3 tức là (-1) con, để lại (-2) con cho 2 bạn còn đang ngủ. Người thứ 2 và thứ 3 cũng làm như vậy và kết quả là mỗi người mang được (-1) con cá về nhà!!!

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H24
10 tháng 11 2017 lúc 23:45

Gọi x là số cá câu được, n là số cá còn lại trên bờ sông, ta tính được kết quả: x=1/8(27n + 38) với n=8/3m – 2 và m thuộc B(3)

Vì họ câu tồi nên x phải nhỏ nhất, nghĩa là n nhỏ nhất, cũng tức là m nhỏ nhất: m=0. Từ đó có đáp số: n = -2 và x = -2

Số cá còn lại trên bờ, sau khi cả 3 anh chàng đã lấy phần mình mang về nhà, đúng bằng số cá cả 3 câu được: x = n = -2

GIẢI THÍCH:Người thứ nhất ngủ dậy, đếm thấy (-2) con cá, không chia hết cho 3, bèn vứt xuống sông thêm 1 con để số cá trở thành (-3); anh ta lấy 1/3 tức là (-1) con, để lại (-2) con cho 2 bạn còn đang ngủ. Người thứ 2 và thứ 3 cũng làm như vậy và kết quả là mỗi người mang được (-1) con cá về nhà

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H24
10 tháng 11 2017 lúc 23:46

Gọi x là số cá câu được, n là số cá còn lại trên bờ sông, ta tính được kết quả: x=1/8(27n + 38) với n=8/3m – 2 và m thuộc B(3)

Vì họ câu tồi nên x phải nhỏ nhất, nghĩa là n nhỏ nhất, cũng tức là m nhỏ nhất: m=0. Từ đó có đáp số: n = -2 và x = -2

Số cá còn lại trên bờ, sau khi cả 3 anh chàng đã lấy phần mình mang về nhà, đúng bằng số cá cả 3 câu được: x = n = -2

DO:Người thứ nhất ngủ dậy, đếm thấy (-2) con cá, không chia hết cho 3, bèn vứt xuống sông thêm 1 con để số cá trở thành (-3); anh ta lấy 1/3 tức là (-1) con, để lại (-2) con cho 2 bạn còn đang ngủ. Người thứ 2 và thứ 3 cũng làm như vậy và kết quả là mỗi người mang được (-1) con cá về nhà

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DC
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NH
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YC
25 tháng 6 2017 lúc 13:11

1 ngày  = ban ngày + ban đêm

nửa ngày = ban ngày

1 ngày ốc bò được :

3 - 2 = 1  (m)

7 ngày ốc bò được :

7 x1 = 7 (m)

sau đến nửa ngày thứ 8 ốc sên bò được :

7 + 3 = 10 (m)

vì ốc sên chưa bò hết ngày thứ 8 nên ốc bò trong 7 ngày rưỡi

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YC
25 tháng 6 2017 lúc 13:01

một ngày ốc sên bò được :

3 - 2 = 1 ( m)

sau số ngày là:

10 : 1 = 10 (ngày)

ĐS....................

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NH
25 tháng 6 2017 lúc 13:02

sai roi ban oi

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NY
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AK
24 tháng 2 2018 lúc 19:57

a , tất cả trẻ em là chủ ngữ 

VN : thế giới đều cắp sách đến trường 

b , CN : dì tôi

VN : lại mua cho vài cái bánh rợm

c , CN : chị tôi 

VN : luôn đứng đầu lớp suốt cả năm học

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PP
24 tháng 2 2018 lúc 19:59

a)Trạng ngữ:Khi ngày mới bắt đầu.

   Chủ ngữ:Tất cả trẻ em thế giới.

   Vị ngữ:Đều cắp sách tới trường.

b)Trạng ngữ:Ở mảnh đất ấy  / Những ngày chợ phiên

   Chủ ngữ:Dì tôi

   Vị ngữ:lại mua cho vài cái bánh rợm

c)Trạng ngữ:Do học hành chăm chỉ

  Chủ ngữ:Chị tôi

  Vị ngữ:Luôn đứng đầu lớp suốt cả năm học.

CHÚC BẠN HỌC TỐT!!!!!!!!!!!!!@@@@@T>I>C>k nha!!!!!!!!!!!!

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PT
24 tháng 2 2018 lúc 20:03

a) Khi một ngày mới bắt đầu / tất cả trẻ em thế giới / đều cắp sách tới trường 

                          TN                               CN                                 VN

b) ở mảnh đất ấy , những này chợ phiên / dì tôi / lại mua cho vài cái bánh rợm

                                  TN                             CN                           VN

c) do học hành chăm chỉ / chị tôi / luôn đứng đầu lớp suốt cả năm học 

                   TN                    CN                       VN

~ học tốt ~

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TA
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ND
6 tháng 4 2018 lúc 18:30

tổng số vận tốc là:

15:5x2=6(km/giơ)

sau số giờ là:

6x5=30(m)

đáp số:30m

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NL
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H24
26 tháng 3 2019 lúc 22:37

Bố ơi mình đi bar nhé

Bố hay đi linh tinh

Bố hay đi một mình

Con ko thích ở nhà,thích đi cùng bố cơ

Dell có chi đâu con, bố đi tí thôi mà

Về bố sẽ mua quà, mà con đừng nói với mẹ

Bố đi chơi gái mẹ ơi, bố ko cho con đi cùng

Nếu bố cho con đi cùng, con sẽ ko mách mẹ đâu

Được rồi hay lắm nhóc con, đi quán bar hay mát-xà

Con muốn đi đâu bố chiều, Bố rất là nhiều tiền

là la la la la la lá la ...

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H24
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H24
4 tháng 2 2015 lúc 18:45

là am-so-ruy hiểu chửa????

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H24
3 tháng 3 2018 lúc 14:11

co gì ngu nhất

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NH
26 tháng 10 2021 lúc 14:31

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 Khách vãng lai đã xóa
LN
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TT
21 tháng 8 2016 lúc 12:55

Số viên bi có tất cả là :

50 - 2 + 2 = 50 ( viên bi )

Đáp số : 50 viên bi

K mình nha    linh ly ngoc

Mọi người k mình nha! Mình ko trả lời tin nhắn do mình hết lượt thông cảm!

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ND
21 tháng 8 2016 lúc 12:41

50 nha 

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BN
21 tháng 8 2016 lúc 13:06

50 nha

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