Input argument "x" is undefined.function y=f(x) y=exp(-x)+exp(x);

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Inputargument"x"isundefined.functiony=f(x)y=exp(-x)+exp(x);Inputargument"x"isundefined.functiony=f(x

Input argument "x" is undefined.function y=f(x) y=exp(-x)+exp(x);
Input argument "x" is undefined.function y=f(x) y=exp(-x)+exp(x);

Input argument "x" is undefined.function y=f(x) y=exp(-x)+exp(x);
没有定义变量x