1 - (\(11\frac{1}{2}\)- 10,1 + x ) : \(8\frac{2}{5}\)= 0
Tìm X
Ai nhanh mik tick cho 3 tick
Tìm số nguyên âm x, biết:
\(^{x^2}-\left(\frac{3}{5}\right)^2=\frac{1}{1\times2}+\frac{1}{2\times7}+\frac{1}{5\times7}+\frac{1}{5\times13}+\frac{1}{8\times13}+\frac{1}{8\times19}+\frac{1}{11\times19}+\frac{1}{11\times19}+\frac{1}{11\times25}\)
AI NHANH MK TICK CHO NHA!
Tìm số tự nhiên x sao cho:
( \(\frac{1}{1\cdot2}+\frac{1}{2\cdot3}+...+\frac{1}{9\cdot10}\))\(\cdot x< \)\(\frac{2}{1\cdot3}+\frac{2}{3\cdot5}+...+\frac{2\cdot9}{11}\)
Các bạn giúp mik nhanh nha
Ai tick mik,mik tick lại
(1/1×2 + 1/2×3 + ... + 1/9×10) × x < 2/1×3 + 2/3×5 + ... + 2/9×11
(1 - 1/2 + 1/2 - 1/3 + ... + 1/9 - 1/10) × x < 1 - 1/3 + 1/3 - 1/5 + ... + 1/9 - 1/11
(1 - 1/10) × x < 1 - 1/11
9/10 × x < 10/11
x < 10/11 : 9/10
x < 10/11 × 10/9
x < 100/99
Mà x là số tự nhiên => x = 0 hoặc 1
\(\left(\frac{1}{1.2}+\frac{1}{2.3}+....+\frac{1}{9.10}\right).x< \frac{2}{1.3}+\frac{2}{3.5}+.....+\frac{2}{9.11}\)
\(\Rightarrow\left(1-\frac{1}{10}\right).x< 2\left(\frac{1}{2}.\frac{10}{11}\right)\Rightarrow\frac{9}{10}.x< \frac{10}{11}\Rightarrow x< \frac{100}{99}\)
Mà:\(x\in N\)\(\Rightarrow x=0\)hoặc \(x=1\)
\(\frac{\frac{2}{5}-\frac{2}{9}+\frac{2}{11}}{\frac{7}{5}-\frac{7}{9}+\frac{7}{11}}-\frac{\frac{1}{3}-\frac{1}{4}+\frac{1}{5}}{\frac{7}{6}-\frac{7}{8}+\frac{7}{10}}\)
mọi người làm nhanh hộ mình ai đúng mik tick cho
Ta có :
\(\frac{\frac{2}{5}-\frac{2}{9}+\frac{2}{11}}{\frac{7}{5}-\frac{7}{9}+\frac{7}{11}}-\frac{\frac{1}{3}-\frac{1}{4}+\frac{1}{5}}{\frac{7}{6}-\frac{7}{8}+\frac{7}{10}}\)
\(=\)\(\frac{2\left(\frac{1}{5}-\frac{1}{9}+\frac{1}{11}\right)}{7\left(\frac{1}{5}-\frac{1}{9}+\frac{1}{11}\right)}-\frac{\frac{1}{3}-\frac{1}{4}+\frac{1}{5}}{\frac{7}{2}\left(\frac{1}{3}-\frac{1}{4}+\frac{1}{5}\right)}\)
\(=\)\(\frac{2}{7}-\frac{1}{\frac{7}{2}}\)
\(=\)\(\frac{2}{7}-\frac{2}{7}\)
\(=\)\(0\)
Chúc bạn học tốt ~
\(\frac{2}{3}x-\frac{3}{2}\left(x-\frac{1}{2}\right)=\frac{5}{12}\)
ai nhanh mik sẽ tick
\(\frac{2}{3}x-\frac{3}{2}\left(x-\frac{1}{2}\right)=\frac{5}{12}\)
\(\Rightarrow\frac{2}{3}x-\frac{3}{2}x+\frac{3}{4}=\frac{5}{12}\)
\(\Rightarrow\frac{-5}{6}x=\frac{5}{12}-\frac{3}{4}=\frac{-1}{3}\)
\(\Rightarrow x=\frac{-1}{3}:\frac{-5}{6}=\frac{2}{5}\)
vậy x = \(\frac{2}{5}\)
= 2/3x - 3/2x - 3/2 × 1/2= 5/12
=> -5/6x - 3/4 = 5/12
=> -5/6x = 5/12 +3/4= 7/6
=>x=7/6 ÷ -5/6 =1/3
TK MK NHA . CHÚC BẠN HỌC GIỎI
ĐÚNG 100% NHA
2/3x-3/2(x-1/2)=5/12
2/3x-3/2x+3/4=5/12
2/3x-3/2x=5/12-3/4
-5/6x=-1/3
x=2/5
tìm x:\(\frac{5}{3}x-\frac{2}{5}x=\frac{19}{10}\)mik cho bài dễ ai nhanh mik tick
\(\frac{5}{3}x-\frac{2}{5}x=\frac{19}{10}\)
\(\left(\frac{5}{3}-\frac{2}{5}\right)x=\frac{19}{10}\)
\(\frac{19}{15}x=\frac{19}{10}\)
\(x=\frac{19}{30}\)
\(\frac{5}{3}x-\frac{2}{5}x=\frac{19}{10}\)
(5/3 - 2/5)x = 19/10
19/15x = 19/10
x = 19/30
\(\frac{5}{3}x-\frac{2}{5}x=\frac{19}{10}\)
\(\left(\frac{5}{3}-\frac{2}{5}\right)x=\frac{19}{10}\)
\(\frac{19}{15}x=\frac{19}{10}\)
\(x=\frac{3}{2}\)
mấy bạn sakura và kudo shinichi tính sai rồi thử vào thấy kết quả của hai bạn là sai
\(Tìm\)\(x\):
a) \(x-\frac{2}{5}+\frac{7}{12}-\frac{1}{2}.\frac{3}{4}-\frac{-9}{16}\)
b) \(\frac{4}{9}.x-\frac{1}{2}=\frac{\left(-5\right)}{9}\)
mấy bn ơi giải giúp mik vs ai nhanh trình bày rõ ràng thì mik tick nha
còn bằng nhau thì mik sẽ xem ai thấp điểm nhất mik tick
VD 1 bn đc 0 điểm 1 bn -2 điểm thì mik tick cho bn bị âm
b) \(\frac{4}{9}x-\frac{1}{2}=\frac{-5}{9}\)
\(\Rightarrow\frac{4}{9}x=\frac{-5}{9}+\frac{1}{2}\)
\(\Rightarrow\frac{4}{9}x=\frac{-1}{18}\)
\(\Rightarrow x=\frac{-1}{18}:\frac{4}{9}\)
\(\Rightarrow x=\frac{-1}{8}\)
1\(\frac{1}{30}:\left(24\frac{1}{6}-24\frac{1}{5}\right)-\)\(1\frac{1}{\frac{2}{4.x-\frac{1}{2}}}-\frac{3}{4}\)=\(\left(-1\frac{1}{15}\right):\left(8\frac{1}{5}-8\frac{1}{3}\right)\)ai nhanh mik tick
Tìm x biết
a) \(\frac{2}{7}< \frac{x}{3}< \frac{11}{4};x\inℕ\)
b)\(\left(4,5m-\frac{3}{4}.5\frac{1}{3}\right).\frac{1}{12}+\frac{1}{2}x=1\frac{1}{2}\)
ai nhanh cho 2 tick
\(\frac{2}{7}< \frac{x}{3}< \frac{11}{4};x\inℕ\)
=>\(\frac{12.2}{84}< \frac{28x}{84}< \frac{11.21}{84}\)
=>\(\frac{24}{84}< \frac{28x}{84}< \frac{231}{84}\)
=>24<28x<231
=>28x\(\in\){25;26;27;28;.............................;230}
=>Các số chia hết cho 28 là:28;56;84;112;140;168;196;224
=>x (thỏa mãn)\(\in\){1;2;3;4;5;6;7;8}
Vậy x\(\in\) {1;2;3;4;5;6;7;8}
\(\left(4,5m-\frac{3}{4}.5\frac{1}{3}\right).\frac{1}{12}+\frac{1}{2}x=1\frac{1}{2}\)
\(\left(4,5m-\frac{3}{4}.\frac{16}{3}\right).\frac{1}{2}.\frac{1}{6}+\frac{1}{2}x=\frac{3}{2}\)
\(\left(4,5m-\frac{48}{12}\right).\frac{1}{2}.\left(\frac{1}{6}+x\right)=\frac{3}{2}\)
\(\left(4,5m-4\right).\left(\frac{1}{6}+x\right)=\frac{3}{2}:\frac{1}{2}\)
\(\left(4,5m-4\right).\left(\frac{1}{6}+x\right)=\frac{3}{2}.\frac{2}{1}\)
\(\left(4,5m-4\right).\left(\frac{1}{6}+x\right)=\frac{6}{2}\)
\(\left(4,5m-4\right).\left(\frac{1}{6}+x\right)=3\)
=>3\(⋮\)\(\frac{1}{6}+x\)
=>\(\frac{1}{6}+x\)\(\in\)Ư(3)={\(\pm\)1;\(\pm\)3}
Ta có bảng:
\(\frac{1}{6}+x\) | -1 | 1 | -3 | 3 |
x | \(-1\frac{1}{6}\) | \(1\frac{1}{6}\) | \(-3\frac{1}{6}\) | 3\(\frac{1}{6}\) |
Vậy x\(\in\){\(-1\frac{1}{6}\);\(1\frac{1}{6}\);\(-3\frac{1}{6}\);\(\frac{1}{6}\)}
Chúc bn học tốt
tìm x
a,\(\frac{1}{2}.x-\frac{3}{4}.x-\frac{7}{3}=\frac{-5}{9}\)
ai làm nhanh nhat mik tick nhe
(1/2-3/4) x - 7/3 = -5/9
-1/4 x =16/9
x= -64/9