F=@(x,y,z)log(x^2+y^2+z^2);g=triplequad(F,90,110,50,70,20,40)这句话怎么错了?

2log(m)y-log(m)x-log(m)z [log(4)(2x)][log(2x)(3y)][log(3y)(z)]=log(8x)[(8x)]^2,则z=? matlab 极小化函数f（x,y) = -9*y - 10*z + 100*(-1*log(100-y-z)) - log(y) - log(z) - log(50-y+z)matlab怎么极小化这个函数,我搞的老是出错 怎么用matlab解这个方程组先是三个方程F(x,y,z)=log(((x^2+y^2+(z-5)^2)^0.5)-y)-log(((x^2+y^2+(z-5)^2)^0.5)+y);D(y,x,z)=log(((x^2+y^2+(z-5)^2)^0.5)-y)-log(((x^2+y^2+(z-5)^2)^0.5)+y); （第二个和第一个很类似,只是变量的位置 F=@(x,y,z)log(x^2+y^2+z^2);g=triplequad(F,90,110,50,70,20,40)这句话怎么错了? 分解因式:f(x,y,z)=x^2(y-z)+y^2(z-x)+z^2(x-y) log(2x)+log(3y)-log(2z) 怎么化简?log3(x^2-2x-6)=2 log(3x+6)=1+log(x)求解,求每步详...log(2x)+log(3y)-log(2z) 怎么化简?log3(x^2-2x-6)=2 log(3x+6)=1+log(x)求解, f(x,y,z)=(x^2+y^2)^0.5+z^1.5,求 ∂f(x,y,z)/∂y log₂log₃log₄ X=log₃log₄log₂ Y=log₄log₂log₃ Z=0X+Y+Z=?为什么是71呀? 若log底数2[log底数3(log底数4)]若log底数2[log底数3(log底数4（x）)]=log底数3[log底数4(log底数2(y))]=log底数4[log底数2(log底数3z)]=0,则x+y+z= 设z=f(x^2-y^2,e^（xy)),求偏导z/x,偏导z/y 一道函数不等式题求出所有这样的函数f:R-R,使得对于一切x,y,z∈R,有f(x+y)+f（y+z）+f(x+z)=3f(x+2y+3z)f(x+y)+f（y+z）+f(x+z)=3f(x+2y+3z)改为f(x+y)+f（y+z）+f(x+z)≥3f(x+2y+3z) 已知x>1,y>1,z>1,log(x)W=24,log(y)W=40,log(xyz)W=12求log(z)W 设f(x,y,z)=e^x*y*z^2,其中z=z(x,y)是由x+y=z+x*e^(z-x-y)确定的隐函数,则f'x(0,1,1)= 设z=f(x^2,y,y/x)可导,求δz/δx,δz/δy 设函数f可微,z=f(ye^x,x/(y^2)) 求z/x,z/y log(2x)+log(3y)-log(2z) 怎么化简? log3(x^2-2x-6)=2 log(3x+6)=1+log(x)求解. 高数求梯度设函数f(x,y,z)=(x-y)2+(y-z)2+(z-x)2,求gradf(x,y,z).我算对了吗