⑵解:①x\geqslant -\dfrac{2}{3}时:3x+2=x-4\Rightarrow 2x=-6\Rightarrow x=-3(舍);②x<{}-\dfrac{2}{3}时:-3x-2=x-4\Rightarrow 4x=2\Rightarrow x=\dfrac{1}{2}(舍);综上:无解.⑶解:①x\leqslant -1时:-x-1+2-x=4\Rightarrow 2x=-3\Rightarrow x=-\dfrac{3}{...
How do you find the integral of x(3+x2)dx ? https://socratic.org/questions/how-do-you-find-the-integral-of-dx-x-sqrt-3-x-2 ∫x3+x2dx=31ln∣∣∣∣∣tan(21tan−1(3x))∣∣∣∣∣+C ... How do you find the integral of ...
See the entire simplification process below: Explanation: To multiply these two terms you multiply each individual term in the left parenthesis by each individual term in the right parenthesis. ((x)+(3))((x)−(8)) ... How do you foil (x−8)(x−4) ? https://socratic....
绝对值不等式\left| x 3 \right|>2的解集为( ). A. \left( -5,-1 \right) B. \left( -\infty ,-5 \right)\cup \left( -1,+\infty \right) C. \left( -1,+\infty \right) D. \left( -\infty ,-5 \right) 相关知识点: ...
解析 left ( (x+3) right )left ( (x-3) right )-xleft ( (x-2) right )=x^2-9-x^2+2x=2x-9把x=4代入原式=2times 4-9=-1.left ( 1 right )前两项相乘可运用平方差公式.left ( 2 right )后两项相乘可运用去括号法则.left ( 3 right )乘积前面是“-”,因此去括号应注意变号....
because A=left ( (left ( (x,y) right )|3x-2y=11) right ) ,B=left ( (left ( (x,y) right )|2x+3y=16) right ) ,therefore left { {{begin{array}{ll} {3x-2y=11} \ {1x+3y=16} end{array}}} right .解得,left { {{begin{array}{ll} {x=5} \ {y=2} end{a...
化简:\left| x+3 \right|+\left| 3-x \right|-\left| x \right|. 相关知识点: 试题来源: 解析 -x;x+6;-x+6;x. 零点:x=-3,x=0,x=3,将数轴分为4段分类讨论:(1)当x < -3,原式=-x-3+3-x+x=-x;(2)当-3\leqslant x < 0,原式=x+3+3-x+x=x+6;(3)当0\leqslant ...
18.函数f(x)=$\left\{\begin{array}{l}{0.x∈\{0.4\}}\\{{x}^{2}-2x+3.0<x≤2}\\{|x-3|.2<x<4}\end{array}\right.$.若f(x)=kx有三个不同的根.则实数k的取值范围是( )A.∪(2$\sqrt{3}$-2.$\frac{3}{2}$]B.[0.$\frac{1}{4}$)∪(2$\sqrt{3}$-2.$\frac{3}...
left { {{begin{array}{ll} {3x+2y=50①} \ {15x+14y=302②} end{array}}} right . ①times 7-②得:6x=48,x=8 方程组把x=8代入①得:3times 8+2y=50,y=13 所以方程组的解为left { {{begin{array}{ll} {x=8} \ {y=13} end{array}}} right . 该题考查四字词语的填空。根据语...
(3)方程无解. (1)x=1或x=5.(2)由\left| x-3 \right|+\left| x+2 \right|最小值为5可知,方程的解为x=3+\frac{6-5}{2}=\frac{7}{2}或x=-2-\frac{6-5}{2}=-\frac{5}{2}.(3)由\left| x-7 \right|+\left| x+1 \right|最小值为8可知,方程无解....