\(\frac{-7}{24}:\frac{17}{14}.\frac{12}{-51}\)
giup voi minh dang can gap
Những câu hỏi liên quan
Tinh bang cach thuan tien nhat
4/7-2/5+17/7-3/5
giup minh voi minh dang can gap
= 17/7 + 4/7 - 2/5 + 3/5
= 21/7 - 5/5
= 3 - 1
= 2
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Tìm x biết :
\(\frac{x}{2}-\frac{2}{3}\left(3x-2\right)=\left(-\frac{1}{2}\right)^3\)
Ai biet giai thi giup minh voi minh like cho minh dang can gap .
Tim gia tri lon nhat cua
\(B=\frac{4}{4x^2+12x+14}\)
xin loi de bai lan truoc minh danh sai nhe cac ban.Mau giai chi tiet giup minh voi minh dang can gap lam
\(4x^2+12x+14=\left(2x\right)^2+2.2x.3+3^2+5=\left(2x+3\right)^2+5\ge5>0\)
\(\Rightarrow B\le\frac{4}{5}\)
Dấu "=" xảy ra khi \(2x+3=0\Leftrightarrow x=-\frac{3}{2}\)
Vậy GTLN của B là \(\frac{4}{5}\)
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\(g,\)\(x+\frac{2}{3}+\frac{2}{5}+\frac{2}{5\cdot9}+\frac{2}{9\cdot13}+........+\frac{2}{101\cdot105}=100\)
Lam on giup minh voi, minh dang can gap lam !!!
thank you very much ><
a)\(x-\frac{4}{5}=\frac{5}{7}\);b)\(5x=\frac{-1}{5}+\frac{11}{5}\); c)\(\frac{5}{3}-x=7+\frac{4}{5}\);d)\(\frac{-5}{11}+2x=\frac{7}{22}\)
CAC BAN GIUP MINH NHE MINH DANG CAN GAP
a) \(x-\frac{4}{5}=\frac{5}{7}\)
\(x=\frac{5}{7}+\frac{4}{5}=\frac{53}{35}\)
b) \(5x=-\frac{1}{5}\)
\(x=-\frac{1}{5}:5=-\frac{1}{25}\)
c) \(\frac{5}{3}-x=7+\frac{4}{5}\)
\(\frac{5}{3}-x=\frac{39}{5}\)
\(x=\frac{5}{3}-\frac{39}{5}=-\frac{92}{15}\)
d) \(-\frac{5}{11}+2x=\frac{7}{22}\)
\(2x=\frac{7}{22}+\frac{5}{11}\)
\(2x=\frac{17}{22}\)
\(x=\frac{17}{22}:2\)
\(x=\frac{17}{44}\)
\(x=-\frac{1}{5}:5\)
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NÈ BẠN!!!
a) \(x-\frac{4}{5}=\frac{5}{7}\)
\(x=\frac{5}{7}+\frac{4}{5}=\frac{25}{35}+\frac{28}{35}=\frac{53}{35}\)
b) \(5x=-\frac{1}{5}+\frac{11}{5}\)
\(5x=2\)
\(x=\frac{2}{5}\)
c)\(\frac{5}{3}-x=7\)
\(x=\frac{5}{3}-7=\frac{5}{3}-\frac{21}{3}=-\frac{16}{3}\)
d) \(-\frac{5}{11}+2x=\frac{7}{22}\)
\(2x=\frac{7}{22}-\frac{-5}{11}=\frac{7}{22}-\frac{-10}{22}=\frac{17}{22}\)
\(x=\frac{17}{22}:2=\frac{17}{22}\cdot\frac{1}{2}=\frac{17}{44}\)
K CHO MÌNH NHA!!!
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Chung minh bat dang thuc sau: \(\frac{x^2}{y^2}\)+\(\frac{y^2}{x^2}\)+4>=3(\(\frac{x}{y}\)+\(\frac{y}{x}\))
Giup mk voi . mk can gap lam. Neu thich thi ket ban voi mk nhe
2,Chung minh voi moi x nguyen duong thi phan so sau toi gian:
\(\frac{6+8x+15x^2}{13+21x+30x^2}\)
giup minh nhe minh dang can gap.
giup mik voi
Cho A= \(\frac{1}{1^2}\)+ \(\frac{1}{2^2}\)+\(\frac{1}{3^2}\)+\(\frac{1}{4^2}\)+ ....+ \(\frac{1}{2018^2}\)
Chung to rang A < \(\frac{7}{4}\)minh dang can gap de nop cho thay
Bo dau ngoac roi rut gon bieu thuc :
a) - ( - 12 + 25 - 36 ) - ( 12 - 36 + 57 )
b) - ( 23 + 5 - 6 + 17 ) + ( 23 - 5 - 83 - 6 )
c) 12 . ( 6 - 7 - 8 ) - 10 . ( 11 + 12 - 13 )
Giup minh voi minh dang can rat gap
a. = 12 - 25 + 36 - 12 + 36 - 57
= (12 - 12) + (36 + 36) - (25 + 57)
= 0 + 72 - 82
= -10
b. = -23 - 5 + 6 - 17 + 23 - 5 - 83 - 6
= (-23 + 23) + (-5 - 5) + (6 - 6) - (17 + 83)
= 0 + (-10) + 0 - 100
= -110
c.?
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