用MATLAB求(-1)^n*sin((pi/(2^n))*x^n)从1到inf函数项级数的和函数
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用MATLAB求(-1)^n*sin((pi/(2^n))*x^n)从1到inf函数项级数的和函数
用MATLAB求(-1)^n*sin((pi/(2^n))*x^n)从1到inf函数项级数的和函数
用MATLAB求(-1)^n*sin((pi/(2^n))*x^n)从1到inf函数项级数的和函数
1到inf求不了的
>> syms n x
symsum((-1)^n*sin((pi/(2^n))*x^n),n,1,10)
symsum((-1)^n*sin((pi/(2^n))*x^n),n,1,inf)
ans =
-sin(1/2*pi*x)+sin(1/4*pi*x^2)-sin(1/8*pi*x^3)+sin(1/16*pi*x^4)-sin(1/32*pi*x^5)+sin(1/64*pi*x^6)-sin(1/128*pi*x^7)+sin(1/256*pi*x^8)-sin(1/512*pi*x^9)+sin(1/1024*pi*x^10)
ans =
sum((-1)^n*sin(pi/(2^n)*x^n),n = 1 ..Inf)
>>