Vì gõ trên Hoc24 khá lâu nên mình gửi hình ảnh cho lẹ
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( 1/1.101 + 1/2.102 + 1/3.103 +...+ 1/10.100 ).x = 1/1.11 + 1/2.12 + 1/3.13 + ...+ 1/100.110
Tính giá trị của :
D=\(\left(\frac{1}{1^2}+\frac{1}{2^2}+\frac{1}{3^2}+...+\frac{1}{2019^2}\right)x\left(\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{2020^2}\right)-\left(\frac{1}{1^2}+\frac{1}{2^2}+\frac{1}{3^2}+...+\frac{1}{2020^2}\right)x\left(\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{2019^2}\right)\)
Bài 1: Tìm x
1)2left|frac{1}{2}.x-frac{3}{8}right|-frac{3}{2}frac{1}{4}
2) -5.left(x+frac{1}{5}right)-frac{1}{2}.left(x-frac{2}{3}right)frac{3}{2}.x-frac{5}{6}
3) 3.left(x-frac{1}{2}right)-5.left(x+frac{3}{5}right)-x+frac{1}{5}
4) frac{3}{4}-2.left|2.x-0,125right|2
5) 2.left|frac{1}{2}.x-frac{1}{3}right|-frac{3}{2}frac{1}{4}
Cần gấp giúp mình với ai trả lời mình tick cho.
Đọc tiếp
Bài 1: Tìm x
1)\(2\left|\frac{1}{2}.x-\frac{3}{8}\right|-\frac{3}{2}=\frac{1}{4}\)
2) -5.\(\left(x+\frac{1}{5}\right)-\frac{1}{2}.\left(x-\frac{2}{3}\right)=\frac{3}{2}.x-\frac{5}{6}\)
3) 3.\(\left(x-\frac{1}{2}\right)-5.\left(x+\frac{3}{5}\right)=-x+\frac{1}{5}\)
4) \(\frac{3}{4}-2.\left|2.x-0,125\right|=2\)
5) \(2.\left|\frac{1}{2}.x-\frac{1}{3}\right|-\frac{3}{2}=\frac{1}{4}\)
Cần gấp giúp mình với ai trả lời mình tick cho.
\(M=\left(\frac{1}{1^2}+\frac{1}{2^2}+\frac{1}{3^2}+....+\frac{1}{2020^2}\right)X\left(\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{2020^2}\right)-\left(\frac{1}{1^2}+\frac{1}{2^2}+\frac{1}{3^2}+...+\frac{1}{2020^2}\right)X\left(\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{2020^2}\right)\)Làm nhanh và ngắn gọn nhất có thể nhé ! mình tik cho 10 tik
Bài 1 : Tính
1) frac{4}{7}-frac{1}{14}+left|frac{-5}{21}right|
2) left|frac{-2}{3}right|-frac{1}{2}+3
3) left|frac{7}{-4}right|-frac{5}{8}+frac{-2}{3}
4) frac{4}{5}+left|frac{-3}{2}right|+frac{1}{-4}
5) left|frac{-1}{4}right|-3+frac{3}{4}
6) left|frac{-1}{3}right|-frac{5}{4}+frac{1}{5}
Bài 2 : Tìm x, biết :
1) x-left|1frac{1}{6}right|frac{5}{21}
2) x+left|-1frac{2}{3}right|left|-frac{3}{4}right|
3) left|x-frac{1}{3}right|frac{5}{2}
4) left|x+frac{2}{3}right|0
5) left|x+2right|frac{1...
Đọc tiếp
Bài 1 : Tính
1) \(\frac{4}{7}-\frac{1}{14}+\left|\frac{-5}{21}\right|\)
2) \(\left|\frac{-2}{3}\right|-\frac{1}{2}+3\)
3) \(\left|\frac{7}{-4}\right|-\frac{5}{8}+\frac{-2}{3}\)
4) \(\frac{4}{5}+\left|\frac{-3}{2}\right|+\frac{1}{-4}\)
5) \(\left|\frac{-1}{4}\right|-3+\frac{3}{4}\)
6) \(\left|\frac{-1}{3}\right|-\frac{5}{4}+\frac{1}{5}\)
Bài 2 : Tìm x, biết :
1) \(x-\left|1\frac{1}{6}\right|=\frac{5}{21}\)
2) \(x+\left|-1\frac{2}{3}\right|=\left|-\frac{3}{4}\right|\)
3) \(\left|x-\frac{1}{3}\right|=\frac{5}{2}\)
4) \(\left|x+\frac{2}{3}\right|=0\)
5) \(\left|x+2\right|=\frac{1}{3}-\frac{1}{5}\)
6) \(\left|x-4\right|=\frac{1}{5}-\left(\frac{1}{2}-\frac{5}{4}\right)\)
7) \(\left|x-\frac{5}{4}\right|=-\frac{1}{3}\)
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E cần gấp lắm ạ, cảm ơn.
Bài 1 : Tính
1) frac{4}{7}-frac{1}{14}+left|frac{-5}{21}right|
2) left|frac{-2}{3}right|-frac{1}{2}+3
3) left|frac{7}{-4}right|-frac{5}{8}+frac{-2}{3}
4) frac{4}{5}+left|frac{-3}{2}right|+frac{1}{-4}
5) left|frac{-1}{4}right|-3+frac{3}{4}
6) left|frac{-1}{3}right|-frac{5}{4}+frac{1}{5}
Bài 2 : Tìm x, biết :
1) x-left|1frac{1}{6}right|frac{5}{21}
2) x+left|-1frac{2}{3}right|left|-frac{3}{4}right|
3) left|x-frac{1}{3}right|frac{5}{2}
4) left|x+frac{2}{3}right|0
5) left|x+2right|frac{1...
Đọc tiếp
Bài 1 : Tính
1) \(\frac{4}{7}-\frac{1}{14}+\left|\frac{-5}{21}\right|\)
2) \(\left|\frac{-2}{3}\right|-\frac{1}{2}+3\)
3) \(\left|\frac{7}{-4}\right|-\frac{5}{8}+\frac{-2}{3}\)
4) \(\frac{4}{5}+\left|\frac{-3}{2}\right|+\frac{1}{-4}\)
5) \(\left|\frac{-1}{4}\right|-3+\frac{3}{4}\)
6) \(\left|\frac{-1}{3}\right|-\frac{5}{4}+\frac{1}{5}\)
Bài 2 : Tìm x, biết :
1) \(x-\left|1\frac{1}{6}\right|=\frac{5}{21}\)
2) \(x+\left|-1\frac{2}{3}\right|=\left|-\frac{3}{4}\right|\)
3) \(\left|x-\frac{1}{3}\right|=\frac{5}{2}\)
4) \(\left|x+\frac{2}{3}\right|=0\)
5) \(\left|x+2\right|=\frac{1}{3}-\frac{1}{5}\)
6) \(\left|x-4\right|=\frac{1}{5}-\left(\frac{1}{2}-\frac{5}{4}\right)\)
7) \(\left|x-\frac{5}{4}\right|=-\frac{1}{3}\)
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E đang cần gấp, cảm ơn :)
Bài 2 : Tìm x, biết :
1) x-left|1frac{1}{6}right|frac{5}{21}
2) x+left|-1frac{2}{3}right|left|-frac{3}{4}right|
3) left|x-frac{1}{3}right|frac{5}{2}
4) left|x+frac{2}{3}right|0
5) left|x+2right|frac{1}{3}-frac{1}{5}
6) left|x-4right|frac{1}{5}-left(frac{1}{2}-frac{5}{4}right)
7) left|x-frac{5}{4}right|-frac{1}{3}
Đọc tiếp
Bài 2 : Tìm x, biết :
1) \(x-\left|1\frac{1}{6}\right|=\frac{5}{21}\)
2) \(x+\left|-1\frac{2}{3}\right|=\left|-\frac{3}{4}\right|\)
3) \(\left|x-\frac{1}{3}\right|=\frac{5}{2}\)
4) \(\left|x+\frac{2}{3}\right|=0\)
5) \(\left|x+2\right|=\frac{1}{3}-\frac{1}{5}\)
6) \(\left|x-4\right|=\frac{1}{5}-\left(\frac{1}{2}-\frac{5}{4}\right)\)
7) \(\left|x-\frac{5}{4}\right|=-\frac{1}{3}\)
frac{12}{16}frac{-x}{4}frac{21}{y}frac{z}{80} (-0,6x-frac{1}{2}).frac{3}{4}-left(-1right)frac{1}{3}
frac{1}{3}x+frac{2}{5}left(x-1right)0
left(2x-3right).left(6-2xright)0
frac{-2}{3}-frac{1}{3}left(2x-5right)frac{3}{2}
2|frac{1}{2}x-frac{1}{3}|-frac{3}{2}frac{1}{4}
frac{3}{4}-2|2x-frac{2}{3}|2
Đọc tiếp
\(\frac{12}{16}=\frac{-x}{4}=\frac{21}{y}=\frac{z}{80}\) \((-0,6x-\frac{1}{2}).\frac{3}{4}-\left(-1\right)=\frac{1}{3}\)
\(\frac{1}{3}x+\frac{2}{5}\left(x-1\right)=0\)
\(\left(2x-3\right).\left(6-2x\right)=0\)
\(\frac{-2}{3}-\frac{1}{3}\left(2x-5\right)=\frac{3}{2}\)
\(2|\frac{1}{2}x-\frac{1}{3}|-\frac{3}{2}=\frac{1}{4}\)
\(\frac{3}{4}-2|2x-\frac{2}{3}|=2\)
1, Tìm X
\(\left(\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+...+\frac{1}{9.10}\right).100-\left[\frac{5}{2}:\left(X+\frac{206}{100}\right)\right]:\frac{1}{2}=89\)