Mathway | 热门问题

热门问题

等级	主题	问题	格式化的问题
140701	求三角函数值	sin(x)=-1/5 , pi<x<(3pi)/2 , cos(x)	$\sin (x) = - \frac{1}{5}$ , $π < x < \frac{3 π}{2}$ , $\cos (x)$
140702	求三角函数值	sin(a)=4/5	$\sin (a) = \frac{4}{5}$
140703	求三角函数值	sin(x)+cot(x)cos(x) = square root of 3	$\sin (x) + \cot (x) \cos (x) = \sqrt{3}$
140704	求定义域和值域	x-3 的自然对数	$\ln (x - 3)$
140705	求定义域和值域	以 2 为底数 x-3 的对数	$\log_{2} (x - 3)$
140706	求三角函数值	tan(x)=-3	$\tan (x) = - 3$
140707	求三角函数值	tan(x)=3/5	$\tan (x) = \frac{3}{5}$
140708	求三角函数值	tan(x)=6/5	$\tan (x) = \frac{6}{5}$
140709	求三角函数值	tan(x/2)=( 3)/3 的平方根	$\tan (\frac{x}{2}) = \frac{\sqrt{3}}{3}$
140710	求三角函数值	tan(x)=-1/4	$\tan (x) = - \frac{1}{4}$
140711	求三角函数值	sin(x)=8/17	$\sin (x) = \frac{8}{17}$
140712	求三角函数值	sin(x)=-3/4	$\sin (x) = - \frac{3}{4}$
140713	求三角函数值	tan(0)=4/3	$\tan (0) = \frac{4}{3}$
140714	求三角函数值	tan(0) = square root of 3	$\tan (0) = \sqrt{3}$
140715	求变量	[[6,3],[8,4]]*[[x],[y]]=[[9],[12]]	$[\begin{array}{c} 6 & 3 \\ 8 & 4 \end{array}] \cdot [\begin{array}{c} x \\ y \end{array}] = [\begin{array}{c} 9 \\ 12 \end{array}]$
140716	求变量	[[6,4],[9,6]][[x],[y]]=[[1],[3]]	$[\begin{array}{c} 6 & 4 \\ 9 & 6 \end{array}] [\begin{array}{c} x \\ y \end{array}] = [\begin{array}{c} 1 \\ 3 \end{array}]$
140717	求变量	[[3,20],[0,15]]=[[x-y,20],[0,2y+x]]	$[\begin{array}{c} 3 & 20 \\ 0 & 15 \end{array}] = [\begin{array}{c} x - y & 20 \\ 0 & 2 y + x \end{array}]$
140718	求变量	[[3,-3x],[20,4]]=[[3,18],[-5y,4]]	$[\begin{array}{c} 3 & - 3 x \\ 20 & 4 \end{array}] = [\begin{array}{c} 3 & 18 \\ - 5 y & 4 \end{array}]$
140719	求变量	[[2,6],[0,1]][[x_1],[x_2]]=[[2],[-3]]	$[\begin{array}{c} 2 & 6 \\ 0 & 1 \end{array}] [\begin{array}{c} x_{1} \\ x_{2} \end{array}] = [\begin{array}{c} 2 \\ - 3 \end{array}]$
140720	求变量	[[x+3,3],[-1,x+7]]=0	$[\begin{array}{c} x + 3 & 3 \\ - 1 & x + 7 \end{array}] = 0$
140721	求变量	[[x+5,2],[-1,x+2]]=0	$[\begin{array}{c} x + 5 & 2 \\ - 1 & x + 2 \end{array}] = 0$
140722	求变量	2[[-a],[b]]-[[-2a],[2b],[c]]=[[4],[-1],[-4]]	$2 [\begin{array}{c} - a \\ b \end{array}] - [\begin{array}{c} - 2 a \\ 2 b \\ c \end{array}] = [\begin{array}{c} 4 \\ - 1 \\ - 4 \end{array}]$
140723	求变量	a=[[1,1],[2,6]]b=[[-1,9],[6,-2]]	$a = [\begin{array}{c} 1 & 1 \\ 2 & 6 \end{array}] b = [\begin{array}{c} - 1 & 9 \\ 6 & - 2 \end{array}]$
140724	गुणनफल नियम का प्रयोग करके अवकलज ज्ञात कीजिये - d/dx	y=(2x^2+3)(3x-4)	$y = (2 x^{2} + 3) (3 x - 4)$
140725	求变量	[[2,2],[7,3]]*[[x],[y]]=[[-4],[10]]	$[\begin{array}{c} 2 & 2 \\ 7 & 3 \end{array}] \cdot [\begin{array}{c} x \\ y \end{array}] = [\begin{array}{c} - 4 \\ 10 \end{array}]$
140726	求三角函数值	(-6,8)	$(- 6, 8)$
140727	求三角函数值	(5/13,y)	$(\frac{5}{13}, y)$
140728	求三角函数值	(-7/25,24/25)	$(- \frac{7}{25}, \frac{24}{25})$
140729	求三角函数值	cos(0)	$\cos (0)$
140730	求三角函数值	cos(75)	$\cos (75)$
140731	求三角函数值	cos(4/5)	$\cos (\frac{4}{5})$
140732	求三角函数值	cos(315 次数 )	$\cos (315 °)$
140733	求三角函数值	cos(arctan(x^2))	$\cos (\arctan (x^{2}))$
140734	求三角函数值	cos((19pi)/3)	$\cos (\frac{19 π}{3})$
140735	求三角函数值	cos(2theta)=( 3)/2 的平方根	$\cos (2 t h e t a) = \frac{\sqrt{3}}{2}$
140736	以标准式表示	3i(2-i)(4+2i)	$3 i (2 - i) (4 + 2 i)$
140737	以标准式表示	11i(5+8i)	$11 i (5 + 8 i)$
140738	Solve Using a Matrix by Elimination	x-8y+4z=12x-3y+3z=-1	$x - 8 y + 4 z = 12 x - 3 y + 3 z = - 1$
140739	求出补集	tan(pi/5)	$\tan (\frac{π}{5})$
140740	(0,40) से गुजरता परवलय, जिसका शीर्ष (1,45), ज्ञात कीजिये	(1,45) , (0,40)	$(1, 45) (0, 40)$
140741	(0,2) से गुजरता परवलय, जिसका शीर्ष (-1,4), ज्ञात कीजिये	(-1,4) , (0,2)	$(- 1, 4) (0, 2)$
140742	(1,-4) से गुजरता परवलय, जिसका शीर्ष (3,4), ज्ञात कीजिये	(3,4) , (1,-4)	$(3, 4) (1, - 4)$
140743	(-5,4) से गुजरता परवलय, जिसका शीर्ष (-4,7), ज्ञात कीजिये	(-4,7) , (-5,4)	$(- 4, 7) (- 5, 4)$
140744	以标准式表示	(-7-5i)(2-4i)	$(- 7 - 5 i) (2 - 4 i)$
140745	Solve Using a Matrix by Elimination	-x+y+z=-1-x+5y-19z=-256x-5y-11z=0	$- x + y + z = - 1 - x + 5 y - 19 z = - 256 x - 5 y - 11 z = 0$
140746	Solve Using a Matrix by Elimination	-x+y+z=-2-x+3y-3z=-167x-5y-11z=0	$- x + y + z = - 2 - x + 3 y - 3 z = - 167 x - 5 y - 11 z = 0$
140747	Solve Using a Matrix by Elimination	-x+y+z=-2-x+5y-19z=-266x-4y-16z=0	$- x + y + z = - 2 - x + 5 y - 19 z = - 266 x - 4 y - 16 z = 0$
140748	Solve Using a Matrix by Elimination	-x+y+z=-1-x+5y-23z=-256x-5y-12z=0	$- x + y + z = - 1 - x + 5 y - 23 z = - 256 x - 5 y - 12 z = 0$
140749	Solve Using a Matrix by Elimination	x+y+z=9 2x-3y+4z=7	$x + y + z = 9$ $2 x - 3 y + 4 z = 7$
140750	Solve Using a Matrix by Elimination	-x+y+z=-3-x+4y-11z=-216x-3y-18z=0	$- x + y + z = - 3 - x + 4 y - 11 z = - 216 x - 3 y - 18 z = 0$
140751	Solve Using a Matrix by Elimination	x+y=12x-y=5	$x + y = 12 x - y = 5$
140752	Solve Using a Matrix by Elimination	x-3y=9-x+3y=-9	$x - 3 y = 9 - x + 3 y = - 9$
140753	Solve Using a Matrix by Elimination	x-2y+z=-93x+4y+5z=9-2x+3y-z=12	$x - 2 y + z = - 93 x + 4 y + 5 z = 9 - 2 x + 3 y - z = 12$
140754	Solve Using a Matrix by Elimination	x-2y+5z=3-2x+6y-11z=33x-16y+20z=-36	$x - 2 y + 5 z = 3 - 2 x + 6 y - 11 z = 33 x - 16 y + 20 z = - 36$
140755	Solve Using a Matrix by Elimination	x-7y+2z=12x-3y+2z=-1	$x - 7 y + 2 z = 12 x - 3 y + 2 z = - 1$
140756	Solve Using a Matrix by Elimination	x-5y=-5 -4x-2y=20	$x - 5 y = - 5$ $- 4 x - 2 y = 20$
140757	Solve Using a Matrix by Elimination	x-4y=92x+5y=5	$x - 4 y = 92 x + 5 y = 5$
140758	Solve Using a Matrix by Elimination	x-3y-z=9 , -x+8y-4z=-24 , 2x-15y+7z=45	$x - 3 y - z = 9$ , $- x + 8 y - 4 z = - 24$ , $2 x - 15 y + 7 z = 45$
140759	Solve Using a Matrix by Elimination	x+y=7x-y=4	$x + y = 7 x - y = 4$
140760	Solve Using a Matrix by Elimination	x+y-3z=3-6x+5z=-6-3x+3y-4z=3	$x + y - 3 z = 3 - 6 x + 5 z = - 6 - 3 x + 3 y - 4 z = 3$
140761	Solve Using a Matrix by Elimination	x+y-z=-55x-y+z=5-x+5y-4z=1	$x + y - z = - 55 x - y + z = 5 - x + 5 y - 4 z = 1$
140762	Solve Using a Matrix by Elimination	x+y-z=-35x-y+z=15-x+4y-3z=1	$x + y - z = - 35 x - y + z = 15 - x + 4 y - 3 z = 1$
140763	Solve Using a Matrix by Elimination	x+y-z=-35x-y+z=9-x+4y-3z=1	$x + y - z = - 35 x - y + z = 9 - x + 4 y - 3 z = 1$
140764	Solve Using a Matrix by Elimination	x+y-z=-44x-y+z=-6-x+5y-4z=1	$x + y - z = - 44 x - y + z = - 6 - x + 5 y - 4 z = 1$
140765	Solve Using a Matrix by Elimination	x+y-z=-52x-y+z=2-x+4y-3z=1	$x + y - z = - 52 x - y + z = 2 - x + 4 y - 3 z = 1$
140766	Solve Using a Matrix by Elimination	x+y-z=-34x-y+z=13-x+5y-4z=1	$x + y - z = - 34 x - y + z = 13 - x + 5 y - 4 z = 1$
140767	Solve Using a Matrix by Elimination	x+y-z=-1x-2y+z=7-2x+2y+4z=-4	$x + y - z = - 1 x - 2 y + z = 7 - 2 x + 2 y + 4 z = - 4$
140768	Solve Using a Matrix by Elimination	4x+y-z=47x+7y-6z=7	$4 x + y - z = 47 x + 7 y - 6 z = 7$
140769	Solve Using a Matrix by Elimination	4x-12y=-16x+4y=4	$4 x - 12 y = - 16 x + 4 y = 4$
140770	Solve Using a Matrix by Elimination	4x-16y=20-x+4y=5	$4 x - 16 y = 20 - x + 4 y = 5$
140771	Solve Using a Matrix by Elimination	-4x-2y=-12 4x+8y=-24	$- 4 x - 2 y = - 12$ $4 x + 8 y = - 24$
140772	Solve Using a Matrix by Elimination	4x-2y-3z=-112x-2y+6z=44y+3z=3	$4 x - 2 y - 3 z = - 112 x - 2 y + 6 z = 44 y + 3 z = 3$
140773	Solve Using a Matrix by Elimination	4x-4y+4z=-44x+y-2z=5-3x-3y-4z=-16	$4 x - 4 y + 4 z = - 44 x + y - 2 z = 5 - 3 x - 3 y - 4 z = - 16$
140774	Solve Using a Matrix by Elimination	4x-5y=1-8x+10y=-2	$4 x - 5 y = 1 - 8 x + 10 y = - 2$
140775	Solve Using a Matrix by Elimination	4x-5y=3-8x+10y=-6	$4 x - 5 y = 3 - 8 x + 10 y = - 6$
140776	Solve Using a Matrix by Elimination	5x+3y=32x-6y=30	$5 x + 3 y = 32 x - 6 y = 30$
140777	Solve Using a Matrix by Elimination	5x+2y+z=-11 , 2x-3y-z=17 , 7x-y=12	$5 x + 2 y + z = - 11$ , $2 x - 3 y - z = 17$ , $7 x - y = 12$
140778	Solve Using a Matrix by Elimination	4x-7y=-5-6x+5y=2	$4 x - 7 y = - 5 - 6 x + 5 y = 2$
140779	Solve Using a Matrix by Elimination	6x-y-9z=54x+y-z=68x+y-8z=8	$6 x - y - 9 z = 54 x + y - z = 68 x + y - 8 z = 8$
140780	Solve Using a Matrix by Elimination	-7x+5y=43-9x+2y=42	$- 7 x + 5 y = 43 - 9 x + 2 y = 42$
140781	Solve Using a Matrix by Elimination	5x+8y=-297x-2y=-67	$5 x + 8 y = - 297 x - 2 y = - 67$
140782	Solve Using a Matrix by Elimination	x+3y=11y-4z=18-3x-5y+7z=-53	$x + 3 y = 11 y - 4 z = 18 - 3 x - 5 y + 7 z = - 53$
140783	Solve Using a Matrix by Elimination	x+3y=-8 21x+6y=3	$x + 3 y = - 8$ $21 x + 6 y = 3$
140784	Solve Using a Matrix by Elimination	x+3y=z+18 , x=2+y-z , x+y+9z=28	$x + 3 y = z + 18$ , $x = 2 + y - z$ , $x + y + 9 z = 28$
140785	Solve Using a Matrix by Elimination	x+3y-z=-3-2x-2y+z=8-x-4y+3z=6	$x + 3 y - z = - 3 - 2 x - 2 y + z = 8 - x - 4 y + 3 z = 6$
140786	Solve Using a Matrix by Elimination	-x+4y=-1-5x+8y=9	$- x + 4 y = - 1 - 5 x + 8 y = 9$
140787	Solve Using a Matrix by Elimination	x+2y=44x+8y=16	$x + 2 y = 44 x + 8 y = 16$
140788	Solve Using a Matrix by Elimination	-x+2y=8x-2y=-8	$- x + 2 y = 8 x - 2 y = - 8$
140789	Solve Using a Matrix by Elimination	x+3y+2z=11 , 4y+9z=-12 , x+7y+11z=-1	$x + 3 y + 2 z = 11$ , $4 y + 9 z = - 12$ , $x + 7 y + 11 z = - 1$
140790	Solve Using a Matrix by Elimination	x+5y=107x+35y=70	$x + 5 y = 107 x + 35 y = 70$
140791	Solve Using a Matrix by Elimination	7x-4y=410x-6y=2	$7 x - 4 y = 410 x - 6 y = 2$
140792	Solve Using a Matrix by Elimination	7x+y-z=79x+9y-8z=9	$7 x + y - z = 79 x + 9 y - 8 z = 9$
140793	Solve Using a Matrix by Elimination	w+2x+5y+5z=-3w+x+3y+4z=-1w-x-y+2z=3	$w + 2 x + 5 y + 5 z = - 3 w + x + 3 y + 4 z = - 1 w - x - y + 2 z = 3$
140794	Solve Using a Matrix by Elimination	w+z=320 , w+x=510 , x-y=140 , y-z=50	$w + z = 320$ , $w + x = 510$ , $x - y = 140$ , $y - z = 50$
140795	Solve Using a Matrix by Elimination	x+2y+2z=1-x-y-4z=32x+5y+2z=6	$x + 2 y + 2 z = 1 - x - y - 4 z = 32 x + 5 y + 2 z = 6$
140796	Solve Using a Matrix by Elimination	w+z=360 , w+x=570 , x-y=160 , y-z=50	$w + z = 360$ , $w + x = 570$ , $x - y = 160$ , $y - z = 50$
140797	Solve Using a Matrix by Elimination	2x+5y=10x-y=3/2	$2 x + 5 y = 10 x - y = \frac{3}{2}$
140798	Solve Using a Matrix by Elimination	2x+3y-6z=1-4x-6y+12z=-2x+2y+5z=10	$2 x + 3 y - 6 z = 1 - 4 x - 6 y + 12 z = - 2 x + 2 y + 5 z = 10$
140799	Solve Using a Matrix by Elimination	2x+7y=-15x+4y=-12	$2 x + 7 y = - 15 x + 4 y = - 12$
140800	Solve Using a Matrix by Elimination	2x+7y=48 , 3x-12y=27	$2 x + 7 y = 48$ , $3 x - 12 y = 27$