matlab 求极限结果通过vpa转换为数值,但类型却不是数值syms x;f1=1.37*sin(-2.73*x);f2=3.77*sin(3.17*x)*sin(-1.56*x);f3=2.44*cos(1.81*x);f4=1.93*exp(-0.58*x);f=f1-f2+f3+f4;g=1.20*x*exp(0.20*x);a=2.7133;b=11.2160;z = limit((f-a)/(g-b),x
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![matlab 求极限结果通过vpa转换为数值,但类型却不是数值syms x;f1=1.37*sin(-2.73*x);f2=3.77*sin(3.17*x)*sin(-1.56*x);f3=2.44*cos(1.81*x);f4=1.93*exp(-0.58*x);f=f1-f2+f3+f4;g=1.20*x*exp(0.20*x);a=2.7133;b=11.2160;z = limit((f-a)/(g-b),x](/uploads/image/z/11723603-59-3.jpg?t=matlab+%E6%B1%82%E6%9E%81%E9%99%90%E7%BB%93%E6%9E%9C%E9%80%9A%E8%BF%87vpa%E8%BD%AC%E6%8D%A2%E4%B8%BA%E6%95%B0%E5%80%BC%2C%E4%BD%86%E7%B1%BB%E5%9E%8B%E5%8D%B4%E4%B8%8D%E6%98%AF%E6%95%B0%E5%80%BCsyms+x%3Bf1%3D1.37%2Asin%28-2.73%2Ax%29%3Bf2%3D3.77%2Asin%283.17%2Ax%29%2Asin%28-1.56%2Ax%29%3Bf3%3D2.44%2Acos%281.81%2Ax%29%3Bf4%3D1.93%2Aexp%28-0.58%2Ax%29%3Bf%3Df1-f2%2Bf3%2Bf4%3Bg%3D1.20%2Ax%2Aexp%280.20%2Ax%29%3Ba%3D2.7133%3Bb%3D11.2160%3Bz+%3D+limit%28%28f-a%29%2F%28g-b%29%2Cx)
matlab 求极限结果通过vpa转换为数值,但类型却不是数值syms x;f1=1.37*sin(-2.73*x);f2=3.77*sin(3.17*x)*sin(-1.56*x);f3=2.44*cos(1.81*x);f4=1.93*exp(-0.58*x);f=f1-f2+f3+f4;g=1.20*x*exp(0.20*x);a=2.7133;b=11.2160;z = limit((f-a)/(g-b),x
matlab 求极限结果通过vpa转换为数值,但类型却不是数值
syms x;
f1=1.37*sin(-2.73*x);
f2=3.77*sin(3.17*x)*sin(-1.56*x);
f3=2.44*cos(1.81*x);f4=1.93*exp(-0.58*x);
f=f1-f2+f3+f4;g=1.20*x*exp(0.20*x);
a=2.7133;b=11.2160;
z = limit((f-a)/(g-b),x,4.1091);
vpa(z)
这个算出来是一个数,但类型却不对,是一个sym而不是value,怎么回事,求解答?
matlab 求极限结果通过vpa转换为数值,但类型却不是数值syms x;f1=1.37*sin(-2.73*x);f2=3.77*sin(3.17*x)*sin(-1.56*x);f3=2.44*cos(1.81*x);f4=1.93*exp(-0.58*x);f=f1-f2+f3+f4;g=1.20*x*exp(0.20*x);a=2.7133;b=11.2160;z = limit((f-a)/(g-b),x
我刚是了一下,是可以显示z的值的
vpa(z)
>> vpa(z)
ans =
-0.5900760592185549671404789427541