matlab求变上限积分对变量x的导数求下列变上限积分对变量x的导数 syms x a tf=sym('sqrt(a+t) '),int(f,x,x^2)错在哪里了? Warning:Explicit integral could not be found.ans =piecewise([a in Dom::ImageSet(y*i,y,R_),(2*(x^
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![matlab求变上限积分对变量x的导数求下列变上限积分对变量x的导数 syms x a tf=sym('sqrt(a+t) '),int(f,x,x^2)错在哪里了? Warning:Explicit integral could not be found.ans =piecewise([a in Dom::ImageSet(y*i,y,R_),(2*(x^](/uploads/image/z/8553235-67-5.jpg?t=matlab%E6%B1%82%E5%8F%98%E4%B8%8A%E9%99%90%E7%A7%AF%E5%88%86%E5%AF%B9%E5%8F%98%E9%87%8Fx%E7%9A%84%E5%AF%BC%E6%95%B0%E6%B1%82%E4%B8%8B%E5%88%97%E5%8F%98%E4%B8%8A%E9%99%90%E7%A7%AF%E5%88%86%E5%AF%B9%E5%8F%98%E9%87%8Fx%E7%9A%84%E5%AF%BC%E6%95%B0+syms+x+a+tf%3Dsym%28%26%2339%3Bsqrt%28a%2Bt%29+%26%2339%3B%29%2Cint%28f%2Cx%2Cx%5E2%29%E9%94%99%E5%9C%A8%E5%93%AA%E9%87%8C%E4%BA%86%3F+Warning%3AExplicit+integral+could+not+be+found.ans+%3Dpiecewise%28%5Ba+in+Dom%3A%3AImageSet%28y%2Ai%2Cy%2CR_%29%2C%282%2A%28x%5E)
matlab求变上限积分对变量x的导数求下列变上限积分对变量x的导数 syms x a tf=sym('sqrt(a+t) '),int(f,x,x^2)错在哪里了? Warning:Explicit integral could not be found.ans =piecewise([a in Dom::ImageSet(y*i,y,R_),(2*(x^
matlab求变上限积分对变量x的导数
求下列变上限积分对变量x的导数
syms x a t
f=sym('sqrt(a+t) '),
int(f,x,x^2)
错在哪里了?
Warning:Explicit integral could not be found.
ans =
piecewise([a in Dom::ImageSet(y*i,y,R_),(2*(x^2 + a)^(3/2))/3 - (2*(a + x)^(3/2))/3],[not a in Dom::ImageSet(y*i,y,R_),int((t + a)^(1/2),t == x..x^2)])
matlab求变上限积分对变量x的导数求下列变上限积分对变量x的导数 syms x a tf=sym('sqrt(a+t) '),int(f,x,x^2)错在哪里了? Warning:Explicit integral could not be found.ans =piecewise([a in Dom::ImageSet(y*i,y,R_),(2*(x^
你的MATLAB应该是2008b或者之后的版本吧?
如果经常需要用到符号运算,建议换用2008a或更早的版本.
MATLAB符号数学工具箱从2008b开始换成MuPad内核,比起早期的Maple来说,有少量改进,但更多的是不足.你的代码在早期版本上没任何问题(以古老的6.5为例):
>> syms x a t>> f=sym('sqrt(a+t) ');
>> J=int(f,x,x^2)
J =
2/3*(a+x^2)^(3/2)-2/3*(a+x)^(3/2)
>> diff(J,x)
ans =
2*(a+x^2)^(1/2)*x-(a+x)^(1/2)
我的网盘提供了2008a下载:pan.baidu.com/s/1pCxN0,供参考选用.