simple functions in MATLAB

Question

My question is - How do I visualize these two functions ; .

For the first one, I've tried -

x=-2:0.1:2;
f=@(x)1/1+x.^2
plot(x,f(x))

And MATLAB doesnt allow me to place

1+x.^2

in parentheses. MATLAB tells me - 'Inner matrix dimensions must agree.'. Same issue with second function.

Answer 1

Division needs to be pointwise, too. So you should do

x=-2:0.1:2;
f=@(x)1./(1+x.^2)
plot(x,f(x))