Mathway | 热门问题

热门问题

等级	主题	问题	格式化的问题
27901	求解函数何时为无定义/不连续	tan(x)=1	$\tan (x) = 1$
27902	求解函数何时为无定义/不连续	tan(x)=4.3315	$\tan (x) = 4.3315$
27903	求解函数何时为无定义/不连续	tan(pi/6)=y/x	$\tan (\frac{π}{6}) = \frac{y}{x}$
27904	求解函数何时为无定义/不连续	tan(2x)=(2(12/5))/(1-(12/5)^2)	$\tan (2 x) = \frac{2 (\frac{12}{5})}{1 - {(\frac{12}{5})}^{2}}$
27905	求解函数何时为无定义/不连续	tan(2x)+tan(5x)=0	$\tan (2 x) + \tan (5 x) = 0$
27906	求解函数何时为无定义/不连续	tan(2x)=1	$\tan (2 x) = 1$
27907	求解函数何时为无定义/不连续	tan(2x)cos(2x)=sin(2x)	$\tan (2 x) \cos (2 x) = \sin (2 x)$
27908	求解函数何时为无定义/不连续	tan(30)=8/x	$\tan (30) = \frac{8}{x}$
27909	求解函数何时为无定义/不连续	cos(53)+cos(25)+sin(53)+sin(25)	$\cos (53) + \cos (25) + \sin (53) + \sin (25)$
27910	求解函数何时为无定义/不连续	cos(7x)+cos(9x)=cos(x)	$\cos (7 x) + \cos (9 x) = \cos (x)$
27911	求解函数何时为无定义/不连续	cos(A)=0.9750	$\cos (A) = 0.975$
27912	求解函数何时为无定义/不连续	cos(pi+x)=-cos(x)	$\cos (π + x) = - \cos (x)$
27913	求解函数何时为无定义/不连续	cos(x)+cos(2x)=0	$\cos (x) + \cos (2 x) = 0$
27914	求解函数何时为无定义/不连续	cos(x)=0.34	$\cos (x) = 0.34$
27915	求解函数何时为无定义/不连续	sin(25)=14/y	$\sin (25) = \frac{14}{y}$
27916	求解函数何时为无定义/不连续	sin(2x)+2cos(x)=0	$\sin (2 x) + 2 \cos (x) = 0$
27917	求解函数何时为无定义/不连续	-sin(2x)+cos(x)=0	$- \sin (2 x) + \cos (x) = 0$
27918	求解函数何时为无定义/不连续	sin(2x)=-( 2)/2 的平方根	$\sin (2 x) = - \frac{\sqrt{2}}{2}$
27919	求解函数何时为无定义/不连续	sin(2x)=9/16	$\sin (2 x) = \frac{9}{16}$
27920	求解函数何时为无定义/不连续	sin(2x)=2sin(x)	$\sin (2 x) = 2 \sin (x)$
27921	求解函数何时为无定义/不连续	y=Atan(Bx-C)	$y =$ Atan $(B x - C)$
27922	求解函数何时为无定义/不连续	y=cos(x)	$y = \cos (x)$
27923	求解函数何时为无定义/不连续	y=cos(x-pi/2)	$y = \cos (x - \frac{π}{2})$
27924	求解函数何时为无定义/不连续	y=cos(x/pi)sin(x)+cos(x)sin(pi/4)	$y = \cos (\frac{x}{π}) \sin (x) + \cos (x) \sin (\frac{π}{4})$
27925	求解函数何时为无定义/不连续	y=cos(1)	$y = \cos (1)$
27926	求解函数何时为无定义/不连续	y=cos(x)(x-6)	$y = \cos (x) (x - 6)$
27927	求解函数何时为无定义/不连续	y=-cot(2x)	$y = - \cot (2 x)$
27928	求解函数何时为无定义/不连续	y=cot(2x+(3pi)/2)	$y = \cot (2 x + \frac{3 π}{2})$
27929	求解函数何时为无定义/不连续	y=cot(8x+pi)	$y = \cot (8 x + π)$
27930	求解函数何时为无定义/不连续	y=csc(x/2)	$y = \csc (\frac{x}{2})$
27931	求解函数何时为无定义/不连续	y=-csc(2x-pi)	$y = - \csc (2 x - π)$
27932	求解函数何时为无定义/不连续	y=csc(x)	$y = \csc (x)$
27933	求解函数何时为无定义/不连续	y=3(0.25)^x	$y = 3 {(0.25)}^{x}$
27934	求解函数何时为无定义/不连续	y=3x^2+5x-4	$y = 3 x^{2} + 5 x - 4$
27935	求解函数何时为无定义/不连续	y=-3cos(2x)	$y = - 3 \cos (2 x)$
27936	求解函数何时为无定义/不连续	y=-3-cot(x-(5pi)/6)	$y = - 3 - \cot (x - \frac{5 π}{6})$
27937	求解函数何时为无定义/不连续	y=3sin(2(2pi))	$y = 3 \sin (2 (2 π))$
27938	求解函数何时为无定义/不连续	y=3sin(2x)	$y = 3 \sin (2 x)$
27939	求解函数何时为无定义/不连续	y=3sin(x-2pi)	$y = 3 \sin (x - 2 π)$
27940	求解函数何时为无定义/不连续	y=3tan(x/4*x+pi/2)	$y = 3 \tan (\frac{x}{4} \cdot x + \frac{π}{2})$
27941	求解函数何时为无定义/不连续	y=-3x+660	$y = - 3 x + 660$
27942	求解函数何时为无定义/不连续	y=3x+a	$y = 3 x + a$
27943	求解函数何时为无定义/不连续	y=3x-4	$y = 3 x - 4$
27944	求解函数何时为无定义/不连续	y=-4x^2+8x+2	$y = - 4 x^{2} + 8 x + 2$
27945	求解函数何时为无定义/不连续	y=-4csc(x)	$y = - 4 \csc (x)$
27946	求解函数何时为无定义/不连续	y=-4tan(8x-pi)	$y = - 4 \tan (8 x - π)$
27947	求解函数何时为无定义/不连续	y=4tan(x-pi/3)	$y = 4 \tan (x - \frac{π}{3})$
27948	求解函数何时为无定义/不连续	y=5csc(3x+5)	$y = 5 \csc (3 x + 5)$
27949	求解函数何时为无定义/不连续	y=5x-6	$y = 5 x - 6$
27950	求解函数何时为无定义/不连续	y=6.5sin(pi/6*(x-3.65))+12.4	$y = 6.5 \sin (\frac{π}{6} \cdot (x - 3.65)) + 12.4$
27951	求解函数何时为无定义/不连续	y=Acos(x)	$y =$ Acos $(x)$
27952	求解函数何时为无定义/不连续	y=Asin(B)x	$y =$ Asin $(B) x$
27953	求解函数何时为无定义/不连续	y=x^2-3	$y = x^{2} - 3$
27954	求解函数何时为无定义/不连续	y=-0.4x-8.9	$y = - 0.4 x - 8.9$
27955	求解函数何时为无定义/不连续	y=12sin(2x)	$y = 12 \sin (2 x)$
27956	求解函数何时为无定义/不连续	y=12tan(pi/2x)	$y = 12 \tan (\frac{π}{2} x)$
27957	求解函数何时为无定义/不连续	y=19	$y = 19$
27958	求解函数何时为无定义/不连续	y=2+sec(x/3)	$y = 2 + \sec (\frac{x}{3})$
27959	求解函数何时为无定义/不连续	y=200sin(3.2x+12.3)+675	$y = 200 \sin (3.2 x + 12.3) + 675$
27960	求解函数何时为无定义/不连续	y=-2cos(x-180/4)+1	$y = - 2 \cos (x - \frac{180}{4}) + 1$
27961	求解函数何时为无定义/不连续	y=2csc(20)	$y = 2 \csc (20)$
27962	求解函数何时为无定义/不连续	y=2sec(x)	$y = 2 \sec (x)$
27963	求解函数何时为无定义/不连续	y=-2sin(x)	$y = - 2 \sin (x)$
27964	求解函数何时为无定义/不连续	tan(55)=29/x	$\tan (55) = \frac{29}{x}$
27965	求解函数何时为无定义/不连续	tan(90)=1/(cot(90))	$\tan (90) = \frac{1}{\cot (90)}$
27966	求解函数何时为无定义/不连续	v=12i-18j	$v = 12 i - 18 j$
27967	求解函数何时为无定义/不连续	v=24i+7j	$v = 24 i + 7 j$
27968	求解函数何时为无定义/不连续	t=(15pi)/2	$t = \frac{15 π}{2}$
27969	求解函数何时为无定义/不连续	((cos(x))/(sin(x))+(sin(x))/(cos(x)))^2	${(\frac{\cos (x)}{\sin (x)} + \frac{\sin (x)}{\cos (x)})}^{2}$
27970	求解函数何时为无定义/不连续	( 3x-16-5)/(x-3) 的平方根	$\frac{\sqrt{3 x - 16} - 5}{x - 3}$
27971	求解函数何时为无定义/不连续	(12x^2-9x-7)/(3x)	$\frac{12 x^{2} - 9 x - 7}{3 x}$
27972	求解函数何时为无定义/不连续	(2.2x10^-7)/((4x10^-15)(1.1x*10^3))	$\frac{2.2 x \cdot 10^{- 7}}{(4 x \cdot 10^{- 15}) (1.1 x \cdot 10^{3})}$
27973	求解函数何时为无定义/不连续	(2x^3-9x^2+11x-6)/(x-3)	$\frac{2 x^{3} - 9 x^{2} + 11 x - 6}{x - 3}$
27974	求解函数何时为无定义/不连续	(3x^3-7x^2+9x-14)/(x-2)	$\frac{3 x^{3} - 7 x^{2} + 9 x - 14}{x - 2}$
27975	求解函数何时为无定义/不连续	(3x^4-9x^3+2x^2-8)/(x-3)	$\frac{3 x^{4} - 9 x^{3} + 2 x^{2} - 8}{x - 3}$
27976	求解函数何时为无定义/不连续	(3x+1)/(3x^3-8x^2-18x-5)	$\frac{3 x + 1}{3 x^{3} - 8 x^{2} - 18 x - 5}$
27977	求解函数何时为无定义/不连续	((1-cot(x))^2)/(cot(x))	$\frac{{(1 - \cot (x))}^{2}}{\cot (x)}$
27978	求解函数何时为无定义/不连续	((d^2)/(d+4))/((d^2-4d)/(d^2+8d+16))	$\frac{\frac{d^{2}}{d + 4}}{\frac{d^{2} - 4 d}{d^{2} + 8 d + 16}}$
27979	求解函数何时为无定义/不连续	((z^2-81)/(z^2-16))/((z^2-z-20)/(z^2+5z-36))	$\frac{\frac{z^{2} - 81}{z^{2} - 16}}{\frac{z^{2} - z - 20}{z^{2} + 5 z - 36}}$
27980	求解函数何时为无定义/不连续	((10r^2-94r+36)/(5r^2+23r-10))/((45r^2-23r+4)/(9r^2+43r-10))	$\frac{\frac{10 r^{2} - 94 r + 36}{5 r^{2} + 23 r - 10}}{\frac{45 r^{2} - 23 r + 4}{9 r^{2} + 43 r - 10}}$
27981	求解函数何时为无定义/不连续	((2x^3-18x)/(x^2-2x-8))/((x^2+x-12)/(x^2-16))	$\frac{\frac{2 x^{3} - 18 x}{x^{2} - 2 x - 8}}{\frac{x^{2} + x - 12}{x^{2} - 16}}$
27982	求解函数何时为无定义/不连续	(25/2+25/(u^2))/(1/2)	$\frac{\frac{25}{2} + \frac{25}{u^{2}}}{\frac{1}{2}}$
27983	求解函数何时为无定义/不连续	(9/49-9/(7x))/(x/49-1/x)	$\frac{\frac{9}{49} - \frac{9}{7 x}}{\frac{x}{49} - \frac{1}{x}}$
27984	求解函数何时为无定义/不连续	(a^-1+1)/(a^-1-1)	$\frac{a^{- 1} + 1}{a^{- 1} - 1}$
27985	求解函数何时为无定义/不连续	(cot(x)^2)/(csc(x)-1)	$\frac{\cot^{2} (x)}{\csc (x) - 1}$
27986	求解函数何时为无定义/不连续	(m^3+3m^2-4m)/(30m^2+60m)	$\frac{m^{3} + 3 m^{2} - 4 m}{30 m^{2} + 60 m}$
27987	求解函数何时为无定义/不连续	(m^3-3m)/(m^2-9)	$\frac{m^{3} - 3 m}{m^{2} - 9}$
27988	求解函数何时为无定义/不连续	(r^4-3r^3-9r^2+19r+24)/((r+3)(r-3))	$\frac{r^{4} - 3 r^{3} - 9 r^{2} + 19 r + 24}{(r + 3) (r - 3)}$
27989	求解函数何时为无定义/不连续	(sec(t)^2-1)/(tan(t)^2)	$\frac{\sec^{2} (t) - 1}{\tan^{2} (t)}$
27990	求解函数何时为无定义/不连续	(v^2-16)/(v^2-v-20)	$\frac{v^{2} - 16}{v^{2} - v - 20}$
27991	求解函数何时为无定义/不连续	(x^2+2x-8)/(x^2-16)	$\frac{x^{2} + 2 x - 8}{x^{2} - 16}$
27992	求解函数何时为无定义/不连续	(x^2+2x-8)/(12x+24)	$\frac{x^{2} + 2 x - 8}{12 x + 24}$
27993	求解函数何时为无定义/不连续	(x^2+6)/(x^2-2x-8)	$\frac{x^{2} + 6}{x^{2} - 2 x - 8}$
27994	求解函数何时为无定义/不连续	(x^2+9x-22)/(x^2-121)	$\frac{x^{2} + 9 x - 22}{x^{2} - 121}$
27995	求解函数何时为无定义/不连续	(x^2+x+6)/(7x^2+7x)	$\frac{x^{2} + x + 6}{7 x^{2} + 7 x}$
27996	求解函数何时为无定义/不连续	(x^2+x-12)/(x^2+2x-8)	$\frac{x^{2} + x - 12}{x^{2} + 2 x - 8}$
27997	求解函数何时为无定义/不连续	(x^2-14x+49)/(x^2-49)	$\frac{x^{2} - 14 x + 49}{x^{2} - 49}$
27998	求解函数何时为无定义/不连续	(x^2-16)/(x^2)*((x^2-4x)/(x^2+5x-36))	$\frac{x^{2} - 16}{x^{2}} \cdot (\frac{x^{2} - 4 x}{x^{2} + 5 x - 36})$
27999	求解函数何时为无定义/不连续	(x^2-25)/(x^2-3x-28)	$\frac{x^{2} - 25}{x^{2} - 3 x - 28}$
28000	求解函数何时为无定义/不连续	(x^2-2x+1)/(x^2-2)	$\frac{x^{2} - 2 x + 1}{x^{2} - 2}$