下面的命令表示()
symsaxy
f=sin(a*x)+y^2*cos(x);
dfdx=diff(f);
symsaxy
f=sin(a*x)+y^2*cos(x);
dfdx=diff(f);
举一反三
- 下面的命令表示( ) syms a x y f=sin(a*x)+y^2*cos(x); dfdx=diff(f);
- 下面的命令表示( )syms a x yf=sin(a*x)+y^2*cos(x);dfdx=diff(f);。 A: 对a求一阶导数 B: 对x求二阶导数 C: 对x求一阶导数 D: 对y求一阶导数
- 17e0b849d3a4a3b.jpg,计算[img=19x34]17e0ab14a855463.jpg[/img]的实验命令为( ). A: syms x; f=diff((1+sin(x)^2)/cos(x),1)f=2*sin(x) + (sin(x)*(sin(x)^2 + 1))/cos(x)^2 B: f=diff((1+sinx^2)/cosx,1)f=1/2/x^(1/2)/(1-x)^(1/2) C: syms x;f=diff((1+sinx^2)/cosx,1)f=2*sin(x) + (sin(x)*(sin(x)^2 + 1))/cos(x)^2
- 设(),求y的4阶导数错误的命令是()A.()syms()f(x)()f(x)=exp(x)*cos(x)()diff(f,4)()B.()syms()f(x)()f(x)=exp(x)*cos(x)()diff(f,x,4)()C.()syms()f(x)()f(x)=exp(x)*cos(x)()diff(f,4,x)()D.()syms()f(x)()f(x)=exp(x)*cos(x)()diff(f,x)
- 设\(z = f(x,y)\),\(x = \sin t\),\(y = {t^3}\),则全导数\( { { dz} \over {dt}} = \) A: \({f'_x} \sin t+ 3{t^2}{f'_y}\) B: \({f'_x} \cos t+ {t^2}{f'_y}\) C: \({f'_x} \cos t+ 3{t^2}{f'_y}\) D: \({f'_y} \cos t+ 3{t^2}{f'_x}\)