$\prod$
#61
Đã gửi 20-07-2017 - 20:12
#62
Đã gửi 22-07-2017 - 10:51
*** Cannot compile formula: \definecolor{qqzzqq}{rgb}{0.,0.6,0.} \definecolor{qqzzff}{rgb}{0.,0.6,1.} \definecolor{qqqqff}{rgb}{0.,0.,1.} \definecolor{cqcqcq}{rgb}{0.7,0.7,0.7} \begin{tikzpicture}[line cap=round,line join=round,>=triangle 45,x=1.0cm,y=1.0cm,scale=1.2] \begin{scriptsize} \draw [color=cqcqcq,dash pattern=on 2pt off 2pt, xstep=1.0cm,ystep=1.0cm] (-4.5,-0.5) grid (6.5,6.5); \draw[->,color=black] (-4.5,0.) -- (6.5,0.); \foreach \x in {-4.,-3.,-2.,-1.,1.,2.,3.,4.,5.,6.} \draw[shift={(\x,0)},color=black] (0pt,1pt) -- (0pt,-1pt); \draw[color=black] (6.2753346706,0.0567254750414) node [anchor=south west] { x}; \draw[->,color=black] (0.,-0.5) -- (0.,6.5); \foreach \y in {,1.,2.,3.,4.,5.,6.} \draw[shift={(0,\y)},color=black] (1pt,0pt) -- (-1pt,0pt); \draw[color=black] (0.0709068438018,6.194132155) node [anchor=west] { y}; \clip(-4.5,-0.5) rectangle (6.5,6.5); \draw [color=qqzzff,domain=-4.5:6.5] plot(\x,{(--7.-1.*\x)/1.}); \draw [color=qqzzqq,domain=-4.5:6.5] plot(\x,{(-8.-3.*\x)/-2.}); \draw (-2.76384069545,5.85423895682)-- (-4.,1.); \draw (-2.76384069545,5.85423895682)-- (6.,1.); \draw (-4.,1.)-- (6.,1.); \draw (-2.76384069545,5.85423895682)-- (1.,1.); \draw (-2.76384069545,5.85423895682)-- (-2.,1.); \draw (-2.76384069545,5.85423895682)-- (-0.666684787568,1.); \draw (-4.,1.)-- (1.61807965227,3.42711947841); \draw (0.157439536366,4.23615930455)-- (-0.666684787568,1.); \draw (-3.58794465843,2.61808844869)-- (-0.666684787568,1.); \draw [fill=white, draw=black] (1.,1.) circle (1.0pt); \draw[color=qqqqff] (1.4820320296,0.5) node {$M(1; 1)$}; \draw[color=qqzzff] (0,6.) node {$d: x+y-7=0$}; \draw[color=qqzzqq] (3,6.3) node {$3x-2y+8=0$}; \draw [fill=white, draw=black] (6.,1.) circle (1.0pt); \draw[color=qqqqff] (6.10515824548,1.17392761383) node {$C$}; \draw [fill=white, draw=black] (-4.,1.) circle (1.0pt); \draw[color=qqqqff] (-4.14797136826,0.947025713666) node {$B$}; \draw [fill=white, draw=black] (-2.,1.) circle (1.0pt); \draw[color=qqqqff] (-2.02076605421,0.847756132344) node {$D$}; \draw [fill=white, draw=black] (0.157439536366,4.23615930455) circle (1.0pt); \draw[color=qqqqff] (0.163164734887,4.478186535) node {$N$}; \draw [fill=white, draw=black] (3.07871976818,2.61807965227) circle (1.0pt); \draw [fill=white, draw=black] (-2.76384069545,5.85423895682) circle (1.0pt); \draw[color=qqqqff] (-2.75819722975,6.06649983616) node {$A$}; \draw [fill=white, draw=black] (1.61807965227,3.42711947841) circle (1.0pt); \draw[color=qqqqff] (1.75147803605,3.64148577813) node {$B_1$}; \draw [fill=white, draw=black] (-0.666684787568,1.) circle (1.0pt); \draw[color=qqqqff] (-0.716080128255,0.776849288542) node {$E$}; \draw [fill=white, draw=black] (-1.1909716269,2.21355479127) circle (1.0pt); \draw[color=qqqqff] (-1.41096719751,2.33679985218) node {$H$}; \draw [fill=white, draw=black] (-0.25461356515,2.61807965227) circle (1.0pt); \draw[color=qqqqff] (-0.460815490569,2.71969680871) node {$G$}; \draw [fill=white, draw=black] (-2.12730678258,1.80903982614) circle (1.0pt); \draw[color=qqqqff] (-2.21930521685,1.64191278292) node {$P$}; \draw [fill=white, draw=black] (-3.58794465843,2.61808844869) circle (1.0pt); \draw[color=qqqqff] (-3.77925578049,2.70551543995) node {$F$}; \draw [fill=white, draw=black] (-3.17589267694,4.23616370276) circle (1.0pt); \draw [fill=white, draw=black] (2.66665760622,1.) circle (1.0pt); \draw [fill=white, draw=black] (-1.30320057954,5.04519913069) circle (1.0pt); \draw [fill=white, draw=black] (4.53935988409,1.80903982614) circle (1.0pt); \end{scriptsize} \end{tikzpicture} *** Error message: Error: Nothing to show, formula is empty
*** Cannot compile formula: \definecolor{qqzzqq}{rgb}{0.,0.6,0.} \definecolor{qqzzff}{rgb}{0.,0.6,1.} \definecolor{qqqqff}{rgb}{0.,0.,1.} \definecolor{cqcqcq}{rgb}{0.7,0.7,0.7} \begin{tikzpicture}[line cap=round,line join=round,>=triangle 45,x=1.0cm,y=1.0cm,scale=1.2] \begin{scriptsize} \draw [color=cqcqcq,dash pattern=on 2pt off 2pt, xstep=1.0cm,ystep=1.0cm] (-4.5,-0.5) grid (6.5,6.5); \draw[->,color=black] (-4.5,0.) -- (6.5,0.); \foreach \x in {-4.,-3.,-2.,-1.,1.,2.,3.,4.,5.,6.} \draw[shift={(\x,0)},color=black] (0pt,1pt) -- (0pt,-1pt); \draw[color=black] (6.2753346706,0.0567254750414) node [anchor=south west] { x}; \draw[->,color=black] (0.,-0.5) -- (0.,6.5); \foreach \y in {,1.,2.,3.,4.,5.,6.} \draw[shift={(0,\y)},color=black] (1pt,0pt) -- (-1pt,0pt); \draw[color=black] (0.0709068438018,6.194132155) node [anchor=west] { y}; \clip(-4.5,-0.5) rectangle (6.5,6.5); \draw [color=qqzzff,domain=-4.5:6.5] plot(\x,{(--7.-1.*\x)/1.}); \draw [color=qqzzqq,domain=-4.5:6.5] plot(\x,{(-8.-3.*\x)/-2.}); \draw (-2.76384069545,5.85423895682)-- (-4.,1.); \draw (-2.76384069545,5.85423895682)-- (6.,1.); \draw (-4.,1.)-- (6.,1.); \draw (-2.76384069545,5.85423895682)-- (1.,1.); \draw (-2.76384069545,5.85423895682)-- (-2.,1.); \draw (-2.76384069545,5.85423895682)-- (-0.666684787568,1.); \draw (-4.,1.)-- (1.61807965227,3.42711947841); \draw (0.157439536366,4.23615930455)-- (-0.666684787568,1.); \draw (-3.58794465843,2.61808844869)-- (-0.666684787568,1.); \draw [fill=white, draw=black] (1.,1.) circle (1.0pt); \draw[color=qqqqff] (1.4820320296,0.5) node {$M(1; 1)$}; \draw[color=qqzzff] (0,6.) node {$d: x+y-7=0$}; \draw[color=qqzzqq] (3,6.3) node {$3x-2y+8=0$}; \draw [fill=white, draw=black] (6.,1.) circle (1.0pt); \draw[color=qqqqff] (6.10515824548,1.17392761383) node {$C$}; \draw [fill=white, draw=black] (-4.,1.) circle (1.0pt); \draw[color=qqqqff] (-4.14797136826,0.947025713666) node {$B$}; \draw [fill=white, draw=black] (-2.,1.) circle (1.0pt); \draw[color=qqqqff] (-2.02076605421,0.847756132344) node {$D$}; \draw [fill=white, draw=black] (0.157439536366,4.23615930455) circle (1.0pt); \draw[color=qqqqff] (0.163164734887,4.478186535) node {$N$}; \draw [fill=white, draw=black] (3.07871976818,2.61807965227) circle (1.0pt); \draw [fill=white, draw=black] (-2.76384069545,5.85423895682) circle (1.0pt); \draw[color=qqqqff] (-2.75819722975,6.06649983616) node {$A$}; \draw [fill=white, draw=black] (1.61807965227,3.42711947841) circle (1.0pt); \draw[color=qqqqff] (1.75147803605,3.64148577813) node {$B_1$}; \draw [fill=white, draw=black] (-0.666684787568,1.) circle (1.0pt); \draw[color=qqqqff] (-0.716080128255,0.776849288542) node {$E$}; \draw [fill=white, draw=black] (-1.1909716269,2.21355479127) circle (1.0pt); \draw[color=qqqqff] (-1.41096719751,2.33679985218) node {$H$}; \draw [fill=white, draw=black] (-0.25461356515,2.61807965227) circle (1.0pt); \draw[color=qqqqff] (-0.460815490569,2.71969680871) node {$G$}; \draw [fill=white, draw=black] (-2.12730678258,1.80903982614) circle (1.0pt); \draw[color=qqqqff] (-2.21930521685,1.64191278292) node {$P$}; \draw [fill=white, draw=black] (-3.58794465843,2.61808844869) circle (1.0pt); \draw[color=qqqqff] (-3.77925578049,2.70551543995) node {$F$}; \draw [fill=white, draw=black] (-3.17589267694,4.23616370276) circle (1.0pt); \draw [fill=white, draw=black] (2.66665760622,1.) circle (1.0pt); \draw [fill=white, draw=black] (-1.30320057954,5.04519913069) circle (1.0pt); \draw [fill=white, draw=black] (4.53935988409,1.80903982614) circle (1.0pt); \end{scriptsize} \end{tikzpicture} *** Error message: Error: Nothing to show, formula is empty
#63
Đã gửi 22-07-2017 - 20:01
$ \huge {\color{DarkRed} \text{TĂNG}}$
Bài viết đã được chỉnh sửa nội dung bởi Nguyenphuctang: 22-07-2017 - 21:58
#64
Đã gửi 27-07-2017 - 13:34
$$\frac{AC}{BC}= \frac{sin30}{sin45}= \frac{1}{\sqrt{2}}$ suy ra $\frac{MC}{AC}= \frac{BC}{2AC}= \frac{1}{\sqrt{2}}$ Vậy$\frac{MC}{AC}= \frac{AC}{BC}$ suy ra $\Delta ABC\sim \Delta MAC\left ( c.g.c \right )$$
#65
Đã gửi 27-07-2017 - 13:35
$Đặt: BC=a. Ta có: $\widehat{ACB}=105^{\circ} $.CHÚ Ý: $Sin105^{\circ}=\frac{\sqrt{6}+\sqrt{2}}{4} $. Tính được: AB,AC,AM theo a như sau: $AB^{2}=\frac{2+\sqrt{3}}{2}a^{2}. AC^{2}=\frac{a^{2}}{2}. AM^{2}=\frac{AC^{2}+AB^{2}}{2}-\frac{BC^{2}}{4}=\frac{2+\sqrt{3}}{4}a^{2} $. Áp dụng định lý hàm cos cho $\triangle AMC $,suy ra: $cosAMC=\frac{\sqrt{2}}{2}\Rightarrow \widehat{AMC}=45^{\circ} $$
Bài viết đã được chỉnh sửa nội dung bởi hthetrung: 27-07-2017 - 13:36
#66
Đã gửi 27-07-2017 - 22:12
\left\{ \begin{gathered} {f}'({{x}_{0}})=2,f({{x}_{0}})=5 \hfill \\ {f}'({{x}_{0}}).{f}'\left( f({{x}_{0}}) \right)=4,f\left( f({{x}_{0}}) \right)=11 \hfill \\ \end{gathered} \right.\Rightarrow \left\{ \begin{gathered} {f}'({{x}_{0}})=2,f({{x}_{0}})=5 \hfill \\ {f}'(5)=2,f(5)=11 \hfill \\ \end{gathered} \right..
#67
Đã gửi 27-07-2017 - 22:13
\left\{ \begin{gathered} {f}'({{x}_{0}})=2,f({{x}_{0}})=5 \hfill \\ {f}'({{x}_{0}}).{f}'\left( f({{x}_{0}}) \right)=4,f\left( f({{x}_{0}}) \right)=11 \hfill \\ \end{gathered} \right.\Rightarrow \left\{ \begin{gathered} {f}'({{x}_{0}})=2,f({{x}_{0}})=5 \hfill \\ {f}'(5)=2,f(5)=11 \hfill \\ \end{gathered} \right..
#68
Đã gửi 13-08-2017 - 17:28
$$B = \sqrt {11} + \sqrt {12} $$
#69
Đã gửi 13-08-2017 - 17:35
Tính giá trị biểu thức:
$$M = \left( {\sqrt 8 - 3\sqrt 2 + \sqrt {10} } \right).\left( {\sqrt 2 + \sqrt {10} } \right):\sqrt[3]{{ - 64}}$$
Bài viết đã được chỉnh sửa nội dung bởi vietlao001: 13-08-2017 - 17:38
#70
Đã gửi 13-08-2017 - 17:39
Test
$$M = ( - \sqrt 2 + \sqrt {10} )(\sqrt 2 + \sqrt {10} ):\sqrt[3]{{ - 64}}$$
#71
Đã gửi 17-08-2017 - 20:24
$$\sqrt{5x^2+14x-9}$$
$$\sqrt{5x^2+14x+9}$$
Bài viết đã được chỉnh sửa nội dung bởi hangnguyen2003: 17-08-2017 - 20:46
It doesn't matter if you're the slowest kid in gym class or the fastest man alive. Every one of us is running, being alive is running, running from something, running to something or someone. And no matter how fast you are. There's some things you can't outrun. Some things always manage to catch up to you.
___ THE FLASH ___
#72
Đã gửi 17-08-2017 - 20:27
$$\sqrt{a+b^2}$$
Bài viết đã được chỉnh sửa nội dung bởi hangnguyen2003: 17-08-2017 - 20:36
It doesn't matter if you're the slowest kid in gym class or the fastest man alive. Every one of us is running, being alive is running, running from something, running to something or someone. And no matter how fast you are. There's some things you can't outrun. Some things always manage to catch up to you.
___ THE FLASH ___
#73
Đã gửi 17-08-2017 - 20:45
Bài 1: Giải phương trình: $$\sqrt{5x^2+14x+9}$$-$$\sqrt{x^2-x-20}$$=5$$\sqrt{x+1}$$
Bài 2: Giải phương trình: 13$$\sqrt{x^2-x^4}$$+9$$\sqrt{x^2+x^4}$$=16
Phải gõ sao cho thẳng hàng đây mọi người ^^
Bài viết đã được chỉnh sửa nội dung bởi hangnguyen2003: 17-08-2017 - 20:56
It doesn't matter if you're the slowest kid in gym class or the fastest man alive. Every one of us is running, being alive is running, running from something, running to something or someone. And no matter how fast you are. There's some things you can't outrun. Some things always manage to catch up to you.
___ THE FLASH ___
#74
Đã gửi 17-08-2017 - 21:10
Bài 1. Giải phương trình: $\sqrt{5x^2+14x+9} - \sqrt{x^2-x-20} = 5\sqrt{x+1}$
It doesn't matter if you're the slowest kid in gym class or the fastest man alive. Every one of us is running, being alive is running, running from something, running to something or someone. And no matter how fast you are. There's some things you can't outrun. Some things always manage to catch up to you.
___ THE FLASH ___
#75
Đã gửi 25-08-2017 - 10:36
Bài viết đã được chỉnh sửa nội dung bởi IrisMorgenster: 25-08-2017 - 10:37
#76
Đã gửi 25-08-2017 - 10:46
$$\sqrt {{b^2} - 4ac} $$
Bài viết đã được chỉnh sửa nội dung bởi IrisMorgenster: 25-08-2017 - 11:03
#77
Đã gửi 25-08-2017 - 10:49
$$\sqrt{a+b^2}$$
Bài viết đã được chỉnh sửa nội dung bởi IrisMorgenster: 25-08-2017 - 10:54
#78
Đã gửi 25-08-2017 - 12:03
$\sqrt{a^{2}}+2\sqrt[2]{a+b}$
$\sqrt{VMF}$
#79
Đã gửi 25-08-2017 - 12:16
$\left\{\begin{matrix} x+y+x=a\\ x^2+y^2+z^2=b^2\\ \frac{1}{x}+\frac{1}{y}+\frac{1}{z}=\frac{1}{c} \end{matrix}\right.$
Bài viết đã được chỉnh sửa nội dung bởi IrisMorgenster: 25-08-2017 - 12:17
#80
Đã gửi 13-09-2017 - 23:23
$x^2 + a^2$
Bài viết đã được chỉnh sửa nội dung bởi Trinh Huy: 13-09-2017 - 23:29
Được gắn nhãn với một hoặc nhiều trong số những từ khóa sau: thử
Vấn đề chung của Diễn đàn →
Hướng dẫn - Trợ giúp - Giải đáp thắc mắc khi sử dụng Diễn đàn →
Thử các chức năng của diễn đàn →
thửBắt đầu bởi nguyen minh hieu hp, 22-04-2018 thử, test, try |
|
|||
Vấn đề chung của Diễn đàn →
Hướng dẫn - Trợ giúp - Giải đáp thắc mắc khi sử dụng Diễn đàn →
Thử các chức năng của diễn đàn →
gõ thửBắt đầu bởi bapbeo, 02-09-2016 thử |
|
|||
Toán Trung học Phổ thông và Thi Đại học →
Tài liệu - đề thi THPT →
Thi TS ĐH →
Tổng hợpĐề thi thử ĐH 2014Bắt đầu bởi namcpnh, 14-01-2014 thử |
|
3 người đang xem chủ đề
0 thành viên, 3 khách, 0 thành viên ẩn danh