How to check whether two functions are equal in mathematica?

[tgt]

How to do that?

 

[Dale]

f[x]==g[x]

 

[tgt]

f[x]==g[x]

It doesn't work like that.

 

[robphy]

Can you ask it to calculate the difference of the two functions?

 

[tgt]

Can you ask it to calculate the difference of the two functions?

Thats a good point, I'd try that.

 

[Dale]

It doesn't work like that.

Oops, you are correct, it wants you to supply arguments to evaluate it at a single point.

You can use TrueQ[f[x]==g[x]] or Simplify[f[x]==g[x]] instead.