yeg6+club

柳官宁4423求函数z=ye^2x的偏导数 -
屈斌采18958971545 ______ z=x²ye^y 那么 ∂z/∂x=2xye^y ∂z/∂y=x²e^y +x²ye^y 所以 二阶偏导数为 ∂²z/∂x²=2ye^y ∂²z/∂x∂y=2xe^y +2xye^y ∂²z/∂y²=x²e^y +x²e^y +x²ye^y=2x²e^y +x²ye^y

柳官宁4423以ask为例写出8种时态的被动语态. -
屈斌采18958971545 ______ 虽然不懂什么叫以ASK为例!我想我答的应该是对的!Tom is asked to clean his room by his mother.Tom was asked to clean his room by his mother.Tom is being asked...

柳官宁4423z=ln(1+x^2+y^2)的二阶偏导数?z=x^2ye^2的二阶偏导数? -
屈斌采18958971545 ______ z对x的 一阶偏导=2x/(1+x^2+y^2) 二阶偏导=(2(1+x^2+y^2)-4x^2)/(1+x^2+y^2)^2 =(2y^2+2-2x^2)/(1+x^2+y^2)^2 z对y的一阶偏导=2y/(1+x^2+y^2) 二阶偏导=(2x^2+2-2y^2)/(1+x^2+y^2)^2 二阶混合偏导=

柳官宁4423张佑赫的<舞炫神迷>的中文拼音歌词 -
屈斌采18958971545 ______ hey I wanna see you work it baby 来作我女伴 lady 兴奋的心跃动着,让我们up,疯hey 若是星期五晚,就一直party yo 那有修长的某人,party move your body 融不入气氛的模...

柳官宁4423求微分方程y'=e^(x+y)满足初始条件y(0)=0的特解 -
屈斌采18958971545 ______ y'=(e^x)(e^y)e^(-y)dy=e^xdx-e^(-y)=e^x+C代入得C=-2特解为e^x+e^(-y)=2或y=-ln(2-e^x)

柳官宁4423求微分方程y'=10^x+y的通解? -
屈斌采18958971545 ______ 答:y'=10^x +y y'-y=10^x y'e^(-x)-ye^(-x)=(10^x)*e^(-x) [ye^(-x)] '=(10/e)^x 积分得:ye^(-x)=[1/ln(10/e)] *(10/e)^x+C y=[1/ln(10/e)]*(10^x) +Ce^x

柳官宁4423e^(xy)+y^3 - 5x=0 的导数 -
屈斌采18958971545 ______ 隐函数求导法:e^(xy)+y??-5x=0,两边求导 e^(xy)*(y+xy')+3y??*y'-5=0 ye^(xy)+[xe^(xy)+3y??]*y'=5 y'=[5-ye^(xy)]/[xe^(xy)+3y??]

柳官宁4423求微分方程dy=(y+sinx)dx的通解 -
屈斌采18958971545 ______ y(x)=-0.5cos(x)-0.5sin(x)+Ce^x

柳官宁4423<王子变青蛙>的歌曲,除了<真爱>和<默念三便CALL MY NAME>还有什么?? -
屈斌采18958971545 ______ 1.歌曲:bye!boy歌手:7f 专辑:王子变青蛙电视原声2.歌曲:不够勇敢歌手:vj 专辑:王子变青蛙电视原声 3.歌曲:闭上眼默念3遍...

柳官宁4423英语老师帮忙做几道语法题啊 -
屈斌采18958971545 ______ 21. These good are ___B____ for export, though a few of them may be sold o...